Features: USB audio input: Connect to a USB interface such as a computer, switch- base, TV BOX, etc. Transfer audio directly to the usb transmitter through the USB interface and wirelessly to Bluetooth-compatible headphones or speakers-. Support bluetooth-compatible5.3 headphones or speakers- without the need for an audio cable or driver installation. Low-latency audio ensures that your Bluetooth-compatible5.3 wireless device can provide sound synchronized with visual media. AUX audio input: 3.5MM audio cable is connected to the usb transmitter, which can input the audio from TV, CDs, MP3 and other devices to the usb transmitter, and wirelessly transmit it to the Bluetooth-compatible headset or speaker.. Support SBC AAC- aptx/aptx-LL/aptx-HD/aptX Adaptive protocol Specifications: Name: Bluetooth-compatible USB Adapter Audio input: USB /AUX Size: As Pictures Bluetooth-compatible Version: 5.3 Transmission distance：more than 10meters Frequency-range: 2.402GHZ-2.480GHZ Support protocol: A2DP, AVRCP USB:5V Support SBC AAC- aptx/aptx-LL/aptx-HD/aptX Adaptive protocol Package Includes: 1PC Bluetooth-compatible USB Adapter note: There is no need to plug- in the audio cable or driver Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.