UGREEN 45492 BT503 Bluetooth 5.3 Transmitter/Receiver

Overview

The UGREEN BT503 (45492) is a two-way Bluetooth 5.3 audio adapter with a 3.5 mm connection and a rechargeable battery. In transmitter mode it sends sound from a TV, computer or other wired source to Bluetooth headphones; in receiver mode it takes music from a phone into a wired speaker, stereo or car aux input. A display shows the mode, codec, connected devices, battery and volume.

Is it right for you?

• Suits a TV or computer with a 3.5 mm headphone or line output, or a speaker, amplifier or car stereo with a 3.5 mm input.
• Check that the Bluetooth device you want to connect supports Bluetooth audio, not only controllers or data. Some TVs, consoles and computers do not.
• Not for optical or USB audio connections, and it does not support LDAC.
• Not confirmed for AirPods Pro 2 or AirPods 4, and it does not return a headset microphone in transmitter mode.

Key features

• Bluetooth 5.3 with the A2DP, AVRCP, HSP and HFP profiles.
• Transmitter codecs SBC, aptX, aptX HD and aptX Adaptive; receiver codecs SBC, AAC, aptX and aptX HD.
• Dual pairing.
• Up to 28 hours in transmitter mode or 32 hours in receiver mode from a 300 mAh, 3.7 V battery; USB-C charging in about 2 hours.
• Range up to 10 m unobstructed; 20 Hz to 20 kHz frequency response; THD+N 0.1% or less.
• Display for mode, codec, devices, battery and volume.

What else you need

A 3.5 mm cable or socket at the wired device, a Bluetooth audio device at the other end and a USB-C cable for charging.

Installation

Choose transmitter or receiver mode to match the wired device, connect the 3.5 mm plug, then pair. Reconnection to saved devices happens when the mode and device are available. Test with other saved Bluetooth devices temporarily disconnected if pairing is difficult.

Before you buy

• Confirm the direction you need: sending audio, receiving audio and returning a microphone are separate capabilities.
• Connect only to headphone or aux line-level sockets, never to speaker-level or unknown signals.
• Walls, crowds and radio congestion can interrupt wireless audio.
• Start at low volume and take listening breaks. Do not use isolating audio where you need to hear traffic or alarms. Pair and adjust while parked when driving.
• Do not crush, puncture, burn or charge a wet, swollen or hot unit, and keep small parts away from children.