[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/RCA 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 play music wirelessly through the 3.5mm or RCA cable of the T88 Bluetooth audio receiver. [Power isolation technology] The T88 Bluetooth audio receiver uses the latest power isolation technology to ensure 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 will affect the transmission of music sound quality) [Easy to use] Plug and play. Plug into a speaker, home stereo system or other car audio via a 3.5mm AUX or RCA 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+EDR Bluetooth Protocol: A2DP/AVCTP Bluetooth Distance: 10 meters Audio Interface: 3.5MM AUX Stereo/RCA/USB U disk Frequency Range: 10Hz-20kHz Signal-to-Noise Ratio:Greater than 110dB Product Size: 92x65x20mm Colour:As Shown Material:plastic Package Contents: 1 x Bluetooth Audio Rec