UGREEN CM403 Bluetooth Transmitter Receiver
Preface
Thank you for purchasing the UGREEN products. For optimum operation, please read this manual carefully before using.
Package Contents
Product Overview
Mode Select
- Transmitter mode (TX): wirelessly stream audio from your non-Bluetooth TV, Switch, or CD player to your Bluetooth earphones or speakers.
- Receiver mode (RX): wirelessly stream audio from your Bluetooth-enabled devices, such as phones, tablets, or computers, to your non-Bluetooth stereo system (e.g., amplifiers, car stereos).
TX Mode-Bluetooth Headphones (1st set)
- Slide the switch to “TX” mode, then press the button for 3 seconds to turn on the product.
- Put the AirPods in pairing mode based on their manual.
- The product will flash blue to indicate successful pairing.
- Plug it into an audio source device(e.g., in-flight entertainment) to enjoy.
TX Mode-Bluetooth Headphones (2nd set)
- Complete the pairing with the 1st set of headphones according to the steps above.
- Put the 2nd set of headphones into pairing mode based on its manual.
- Double-press the button to put the product into pairing mode and let it connect to the 2nd headphones.
- The product will flash blue to indicate a successful pairing.
RX Mode-1st Phone
- Slide to “RX” mode, then press and hold the button for 3s to turn on the product.
- Open up your phone’s Bluetooth list and connect to “UGREEN-80893”.
- The product will flash blue to indicate a successful pairing.
- Plug it into an audio output device (e.g., speaker) to play music.
RX Mode-2nd Phone
- Complete the pairing with the 1st phone (tablet/computer).
- Double-press the button to put the product in pairing mode. During this time, the 1st phone will auto-disconnect from the product. Search and connect to “UGREEN-80893” in your 2nd phone’s Bluetooth list. The product will flash blue once paired.
- Click to reconnect to the product in your 1st phone Bluetooth list.
Note: It only plays music on one mobile phone at a time.
Charging
Reset
Warning
- The product contains a polymer lithium-ion battery; please do not dismantle, crush, squeeze, or expose it to fire.
- Stop using it when it is swollen.
- Do not expose the product to excessive temperature.
- Stop using it when the battery is submerged.
- Keep out of reach of children and pets.
- If a battery is swallowed or inserted elsewhere in the body, please seek emergency care immediately.
Specifications
- The data are measured by UGREEN lab but may vary based on specific circumstances..
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UGREEN CM403 Bluetooth Transmitter Receiver-FAQs
How do I use the UGREEN CM403 Bluetooth transmitter/receiver?
Plug the device into the AUX port, switch to either TX (transmit) or RX (receive) mode, turn it on, and pair it with your Bluetooth device. Once connected, audio will stream wirelessly.
How do I use a Bluetooth transmitter in general?
Connect the transmitter to your TV or audio source via AUX/optical/RCA, then pair your Bluetooth headphones or speaker. After pairing, audio plays wirelessly.
How do I pair the UGREEN CM403?
Insert it into the AUX port, press and hold the multi-function button for 3 seconds, and it will enter pairing mode automatically. Select it from your device’s Bluetooth list to connect.
Does the UGREEN CM403 work with AirPods?
Yes. It supports all Bluetooth earbuds, including AirPods and AirPods Pro 2.
Can I use the CM403 with Bluetooth headphones?
Absolutely. It works with most Bluetooth headphones, earphones, and speakers.
What is the battery life of the UGREEN CM403?
It lasts up to 8 hours in transmit mode (TX) and around 5.5 hours in receive mode (RX) on a full charge.
Why is my Bluetooth transmitter not connecting?
Common reasons include being out of range, low battery, interference, or the device already being paired elsewhere. Restart both devices and try pairing again.
How do I reset or hard-reset the UGREEN CM403?
Turn it off, then hold the power button for about 10–12 seconds until the LED flashes rapidly. This clears previous pairing records.
How do I connect the UGREEN transmitter to my TV?
Plug it into your TV’s 3.5mm headphone jack, optical output, or RCA audio out (depending on your TV). Put it in TX mode, then pair your headphones.