Original price
Rs. 5,159.00
-
Original price
Rs. 5,159.00
Original price
Rs. 5,159.00
Current price
Rs. 2,987.00
Rs. 2,987.00
-
Rs. 2,987.00
Current price
Rs. 2,987.00
| /
CM872 • 3.5MM TX/RX • DUAL PAIRING
UGREEN 45812 CM872 Bluetooth 5.4 TX/RX Audio Adapter
Overview
Bluetooth 5.4SKU 45812CM872TX + RX
UGREEN 45812 transmitter-receiver product view
Key features
Role
a rechargeable two-way 3.5mm Bluetooth audio adapter for transmitting from wired sources to Bluetooth listeners or receiving phone/tablet audio on a wired AUX system.
Audio path
In TX, audio enters through the attached 3.5mm plug from a TV, airplane seat, computer or gym machine and travels to Bluetooth headphones/speakers. In RX, phone/tablet audio arrives by Bluetooth and exits the plug into a car, powered speaker or stereo AUX input.
Codec boundary
No codec list is published for the India Bluetooth 5.4 revision. SBC, AAC, aptX, LDAC and LC3 are not asserted beyond whatever compatible endpoints negotiate.
Power design
Up to 18 hours in RX mode and 16 hours in TX mode. Figures are test maxima and vary with volume, endpoint, temperature, battery age and radio conditions. Rechargeable through USB-C. No full-charge time is asserted for the stored revision.
Audio direction and connector roles
In TX, audio enters through the attached 3.5mm plug from a TV, airplane seat, computer or gym machine and travels to Bluetooth headphones/speakers. In RX, phone/tablet audio arrives by Bluetooth and exits the plug into a car, powered speaker or stereo AUX input.
Connector rule: a source/output must feed a destination/input. USB power, USB host data, analogue AUX and Bluetooth radio roles are separate even when one enclosure handles several of them.
Start safely: set the correct mode, select the target input and lower every volume control before testing.
Supported transmitter source and destination map
Sound, codecs, calls and latency
Codecs
No codec list is published for the India Bluetooth 5.4 revision. SBC, AAC, aptX, LDAC and LC3 are not asserted beyond whatever compatible endpoints negotiate.
Latency
UGREEN describes reduced latency but gives no number or codec. It is not certified for musical-instrument monitoring and is explicitly listed as incompatible with instruments.
Microphone and calls
Real-world fidelity
Source file, negotiated codec, radio conditions, analogue cable, amplifier and speakers/headphones all affect the result. A newer Bluetooth number is not automatically higher sound quality.
Two-listener television transmitter scenario
Use scenarios
Scenario 1
Airplane audio to supported Bluetooth headphones.
Scenario 2
TV listening through one or two compatible headsets.
Scenario 3
Phone music to a car AUX system.
Scenario 4
Tablet streaming to an older powered speaker.
Scenario 5
Portable two-way audio conversion during travel.
Airline-seat transmitter use scenario
Setup and usability guidance
Step 1: Charge the adapter and select TX or RX.
Step 2: Connect the 3.5mm plug to an output in TX or an AUX input in RX.
Step 3: Pair one Bluetooth endpoint and verify low-volume audio.
Step 4: Add the second endpoint only after the first is stable.
Step 5: On an aircraft, follow crew instructions and ensure the seat socket is a permitted headphone output.
Usability rule: establish one clean path first. Add a second source, listener, output or peripheral only after the first works reliably.
Controls
Use the physical TX/RX switch before pairing; the multifunction control and reset opening handle power, pairing and recovery according to the CM872 manual.
Second-device behaviour
Two Bluetooth devices can connect in TX or RX. TX can share one source with two listeners; RX supports convenient two-source connection, not mixing two songs.
Recovery
Use the marked reset control/manual sequence after forgetting saved pairings. Re-pair one endpoint at close range before restoring a second.
Receiver-mode two-phone car scenario
Compatible devices and systems
Class: TVs, airplane entertainment, computers and gym machines with 3.5mm audio output in TX; Bluetooth phones/tablets plus cars, amplifiers and powered speakers with 3.5mm AUX input in RX.
Match the operating-system/audio profile and connector role, not only the Bluetooth logo.
Confirm whether you need programme audio, microphone return, peripheral data or file transfer; these use different profiles.
For AUX/RCA products, confirm the destination is a line-level input and already has its own amplifier.
For PC adapters, verify driver requirements and disable a competing built-in Bluetooth radio.
For two-way products, confirm that the chosen TX or RX mode matches the wired device.
Receiver-mode powered-speaker use scenario
What this product does
Switches a 3.5mm connection between transmitter input and receiver output roles.
Pairs the number of endpoints documented for this SKU.
Runs from its internal rechargeable battery for portable use.
Reconnects to saved compatible endpoints when the selected mode matches.
Carries programme audio within the codec and call boundaries stated above.
What this product does not do
not compatible with AirPods Pro 2, AirPods 4 or AirPods 4 ANC per UGREEN; not for musical instruments, keyboards, mice, printers, file transfer, optical audio, microphone return or water exposure.
Does not guarantee uninterrupted wireless service through metal, walls, crowds or heavy 2.4GHz interference.
Does not repair a damaged source, USB port, AUX socket, amplifier or speaker.
Does not make a connector compatible merely because it fits physically.
Does not prove ANC, aptX, LDAC, multipoint or microphone return from the Bluetooth version number alone.
What to do
Check the label
Confirm SKU, model and stored revision on the product or box before relying on a specification.
Begin with one endpoint
Pair and test one path before adding any supported second device or output.
Lower volume first
Protect hearing and speakers when changing mode, output, codec, call profile or device.
Keep connections dry
Inspect USB and audio plugs, remove debris without metal tools and dry completely before power.
Use official drivers/manuals
Use the CM/BT model instructions; related UGREEN revisions can use different buttons and radios.
Pause before switching
When two sources are connected, pause the current programme before starting the other.
What not to do
Do not infer features
Bluetooth 5.x/6.0 alone does not establish codec, ANC, microphone, multipoint or delay.
Do not force plugs
Stop if a connector does not align; check port type, direction, damage and case clearance.
Do not use speaker-level output
AUX/RCA receiver inputs are line-level; passive speakers still need an amplifier.
Do not pair while moving
Configure car and aircraft audio before movement and follow local/crew instructions.
Do not charge damaged cells
Stop for swelling, leakage, odour or abnormal heat and seek proper battery disposal.
Do not borrow reset timing
Battery, charging and realistic runtime
Battery/power: Up to 18 hours in RX mode and 16 hours in TX mode. Figures are test maxima and vary with volume, endpoint, temperature, battery age and radio conditions.
Charging/connection: Rechargeable through USB-C. No full-charge time is asserted for the stored revision.
Published runtime is normally a controlled maximum; volume, calls, codec, temperature, range and battery age can shorten it.
USB-powered models have no reserve runtime and stop when vehicle/computer power stops.
Use compliant, undamaged power sources and disconnect any product that becomes unusually hot.
Do not leave rechargeable products empty for months; follow the manual for long-term storage.
Up to 18-hour battery guide
Warnings and limitations
Hearing: begin at low volume, limit exposure and stop if you notice discomfort or ringing. Bluetooth features and noise processing are not hearing protection.
Battery: never crush, puncture, short, burn or charge a swollen, leaking, wet or unusually hot rechargeable product. USB-powered models still require a sound, compliant 5V source.
Aircraft: follow crew instructions, use only permitted headphone outputs and keep wireless devices off whenever directed. Carry lithium products in accordance with airline rules.
Driving: pair, mount, select sources and set volume while parked. Hands-free calling does not remove attention or legal responsibilities.
Water: This product does not has a IP rating. Keep adapters, plugs and charging ports dry; never connect power while damp.
Heat and storage: do not leave the product on a hot dashboard, near a heater or in direct sun. Keep small adapters and cables away from children and pets.
Audio ports: connect only to the stated headphone/AUX line-level role. Never connect a 3.5mm/RCA port to mains, passive-speaker output or an unknown industrial signal.
Troubleshooting and reset
No pairing
Bring devices close, verify power/mode, disconnect competing saved devices and pair one endpoint first.
Connected but silent
Check source playback, OS output, TX/RX direction, AUX input selection, cable seating and both volume controls.
Audio but no microphone
Drop-outs
Reduce distance and metal/body obstruction, move from crowded 2.4GHz radios and test one connection at a time.
Delay
Compare with a wired path; no unstated codec or Bluetooth version can remove all source and endpoint buffering.
Reset path
Use the marked reset control/manual sequence after forgetting saved pairings. Re-pair one endpoint at close range before restoring a second.
Technical specifications
Product / model
UGREEN Bluetooth audio receiver/transmitter / CM872
SKU / colour
45812 / white
Bluetooth version
5.4, India/Canada revision
Modes
TX and RX
Wired interface
Attached 3.5mm audio plug
Dual pairing
Two endpoints in TX or RX
Runtime
Up to 16h TX / 18h RX
Working band
2.400–2.4835GHz
Charging
USB-C rechargeable
Codecs
Not published for stored revision
Microphone/calls
Not verified
Instrument use
Explicitly not compatible
AirPods limitation
Pro 2, 4 and 4 ANC listed unsupported
Listed ranges and runtimes are qualified maxima in suitable conditions, not universal guarantees.
Package contents
Package: CM872 adapter, USB-C charging cable and documentation; confirm the sealed box if a twin-prong airplane adapter is required because media does not show one.
Pre-purchase checklist
Confirm this SKU/revision on the sealed product.
Confirm TX, RX or Windows-host direction.
Confirm every wired input/output and required power source.
Confirm call/microphone, codec and second-device needs separately.
Check whether any cable, charger or flight adapter you require is actually listed.
Product-specific FAQ
What exactly is UGREEN 45812?
It is a rechargeable two-way 3.5mm Bluetooth audio adapter for transmitting from wired sources to Bluetooth listeners or receiving phone/tablet audio on a wired AUX system.
How do TX and RX modes differ?
In TX, audio enters through the attached 3.5mm plug from a TV, airplane seat, computer or gym machine and travels to Bluetooth headphones/speakers. In RX, phone/tablet audio arrives by Bluetooth and exits the plug into a car, powered speaker or stereo AUX input.
Which codecs does SKU 45812 support?
No codec list is published for the India Bluetooth 5.4 revision. SBC, AAC, aptX, LDAC and LC3 are not asserted beyond whatever compatible endpoints negotiate.
Is low latency guaranteed?
UGREEN describes reduced latency but gives no number or codec. It is not certified for musical-instrument monitoring and is explicitly listed as incompatible with instruments.
Do microphone and calls work?Can two listeners or sources stay connected?
Two Bluetooth devices can connect in TX or RX. TX can share one source with two listeners; RX supports convenient two-source connection, not mixing two songs.
What battery life or power does it use?
Up to 18 hours in RX mode and 16 hours in TX mode. Figures are test maxima and vary with volume, endpoint, temperature, battery age and radio conditions. Rechargeable through USB-C. No full-charge time is asserted for the stored revision.
Which devices and systems are compatible?
TVs, airplane entertainment, computers and gym machines with 3.5mm audio output in TX; Bluetooth phones/tablets plus cars, amplifiers and powered speakers with 3.5mm AUX input in RX.
What should I do if pairing fails?
Use the marked reset control/manual sequence after forgetting saved pairings. Re-pair one endpoint at close range before restoring a second.
What is in the package?
CM872 adapter, USB-C charging cable and documentation; confirm the sealed box if a twin-prong airplane adapter is required because media does not show one
What should it not be used for?
not compatible with AirPods Pro 2, AirPods 4 or AirPods 4 ANC per UGREEN; not for musical instruments, keyboards, mice, printers, file transfer, optical audio, microphone return or water exposure.
