[Wake up old audio equipment] The T88 Bluetooth audio receiver can connect old home stereo speakers, wired retro speakers, wired speakers, wired headphones, car audio, and amplifiers through the 3.5mm AUX/ interface, giving old equipment a lease of life! [Enjoy wireless streaming music] The T88 Bluetooth audio receiver uses an advanced Bluetooth 5.3 chip design with better compatibility and stability, which can retain perfect lossless sound quality and enjoy wireless high-fidelity music streaming! [Support USB U disk playback] The T88 Bluetooth audio receiver has a USB U disk slot. You can choose to play from a smart device or a U disk! Whether you are using an old speaker, a retro speaker, a home speaker, or an amplifier, you can easily wirelessly through the 3.5mm or cable of the T88 Bluetooth audio receiver. [Power isolation technology] The T88 Bluetooth audio receiver uses the latest power isolation technology to perfect sound quality and high-quality audio, allowing you to experience audiophile-level music. (The MIC call function is not supported temporarily, because the microphone affect the transmission of quality) [Easy to use] Plug and play. Plug into a speaker, home stereo system or other car audio via a 3.5mm AUX or audio cable, and then pair the T88 Bluetooth receiver with a Bluetooth audio device such as a smartphone or tablet. After that, you can enjoy wireless music. Product Name: T88 Bluetooth 5.3 Audio Receiver Bluetooth Version: V5.3+ Bluetooth Protocol: A2DP/AVCTP Bluetooth Distance: 10 meters Audio Interface: 3.5MM AUX Stereo//USB U disk Frequency Range: 10Hz-20kHz Signal-to-Noise Ratio: 110dB Product Size: 92x65x20mm Colour:As Shown Material:plastic Package Contents: 1 x Bluetooth Audio Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.