UGREEN 35222A CM672 Bluetooth 5.2 Airplane TX/RX Adapter

Overview

The UGREEN CM672 is a small Bluetooth adapter on a 3.5 mm plug that works in two directions. In transmit mode it sends sound from an aeroplane seat socket, a TV or a computer to your wireless headphones; in receive mode it streams music from your phone into a wired speaker or car stereo. It runs on its own battery, so it suits travel and any device with a headphone or AUX socket that lacks Bluetooth.

Is it right for you?

• Suits in-flight entertainment, treadmills, TVs and computers with a 3.5 mm headphone socket when you want to use Bluetooth headphones.
• Also suits a wired speaker, home stereo or car AUX input that you want to feed from a phone.
• It uses the SBC codec when transmitting and SBC or AAC when receiving. If you need aptX or LDAC, choose a different adapter.
• Calls work in receive mode only. In transmit mode the microphone is not used.
• It cannot drive passive speakers; the destination needs its own amplifier.

Key features

• Bluetooth 5.2 with a switch between transmitter (TX) and receiver (RX) modes.
• Integrated 3.5 mm TRS plug, so no extra cable is needed at the socket.
• Pairs up to two endpoints in either mode: two headphones in TX, or two phones in RX.
• Built-in microphone for calls in RX mode. Profiles supported: A2DP, AVRCP, HSP and HFP.
• 300 mAh, 3.7 V battery (1.11 Wh) giving up to 28 hours in TX mode or 20 hours in RX mode. Charges over USB-C.
• Range up to 10 m with nothing in the way.

What else you need

• A device with a 3.5 mm headphone or AUX socket, plus Bluetooth headphones (TX) or a Bluetooth phone (RX).
• A USB-C cable and a 5 V USB power source for charging.

Before you buy

• Choose the mode that matches the wired device: TX when the wired device is a source, RX when it is a speaker.
• No aptX or LDAC, no optical audio, no USB data audio, no TX microphone return and no guaranteed lip-sync with video.
• Aircraft use remains subject to crew instructions. Use only permitted headphone outputs and keep wireless off when directed. Carry lithium products in line with airline rules.
• It has no water-resistance rating. Keep the plug and USB-C port dry and never charge it while damp.
• Do not crush, puncture or charge a swollen, wet or unusually hot unit, and do not leave it in direct sun or on a hot dashboard.
• Connect only to headphone or AUX line-level sockets, never to speaker outputs, mains or unknown signals.
• Start at low volume and limit listening time.