Signal Stable: This Bluetooth-compatible audio transmitter is designed with an external antenna that improves the signal. Can be connected to computer, CD player, MP3, laptop, etc. Application: Can transmit audio signal, so the Bluetooth-compatible earphone can receive the signal. Applicable Occasions: perfect for to music, games, watching , etc. Wide Compatibility: designed with USB connector and 3.5mm port to connect multiple devices. Name: Transmitter Bluetooth-compatible compatible version: 5.2+ Input port: USB/AUX Audio decoding: , -LL Transmission distance: 10m Frequency range: 2.402Ghz-2.480Ghz Supported protocols: , A2DP, AVRCP Power supply: USB 5V Type: Bluetooth Audio Transmitter Interface: 3.5mm Wireless Type: bluetooth Content: Audio&Video color:Black Material:ABS Package Contents: 1 x Transmitter 1 x 3.5mm Audio Cable 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.