Features: 【Wake Up The Old Stereo Equipment】 The T88 Bluetooth Audio Receiver can be connected to the old home stereo speaker, wired retro stereo, wired speaker, wired headset, Car stereo, amplifier Via the 3.5mm AUX/RCA Interface, giving old devices a whole new life! 【Enjoy Wireless Streaming Music】The T88 Bluetooth Audio Receiver Uses an Advanced Bluetooth 5.3 Chip Design, It Has Better Compatibility And Stability, is able to retain perfect lossless sound quality, Enjoy Wireless Hi-fi Music Streaming! 【Support USB U-disk Playback】The T88 Bluetooth Audio Receiver with the USB U-disk slot. You can choose either to play from your smart device or U-disk! No matter whether you are using an old speaker, vintage stereo, home speaker, or amplifier, you can easily turn the music into wireless via the 3.5 mm or RCA cables 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 fever-level music. (MIC call function is not supported for the time being, because the microphone will affect the transmission of music audio quality) 【Easy To Use】Easy plug, pair & play. Plug into speakers, home stereo systems, or other car stereos via the 3.5 mm AUX or RCA audio cable, then pair the T88 Bluetooth Receiver with Bluetooth audio devices such as smartphones or tablets. After that, you can enjoy the wireless music. Specifications: 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: >110dB Product Size: 92*65*20mm Package List: 1x T88 Bluetooth 5.3 Audio Receiver Adapter 1x 3.5MM AUX Audio Cable 1x RCA Audio Cable 1x Type-C Power Cable 1x User Manual Please Note: ●Powered By USB Charging (No built-in battery ) We recommend that you use a 5V1A charger to power the adapter to avoid insufficient voltage and current, which may cause current sound or noise when the adapter is in use. ●It's a Bluetooth audio receiver only, not a transmitter. Can only be used for audio transmission,So you couldn't use it for your keyboard, mouse, file transfer. (The function of the Bluetooth receiver is to add Bluetooth wireless function to the wired speaker/headphone so that the Bluetooth-enabled device such as the mobile phone can be wirelessly connected to the wired speaker/headphone through the adapter.)