Product Name: NFC multi function Bluetooth adapter Product version: Standard/Remote Bluetooth Version: Bluetooth V5.0 Battery: 3.7V/500mAh Using Time: Listen to music for about 10 hours and stand by for 30 Transmission Range: 10m ( free) Interface: 3.5mm AUX/2RCA Input Parameter: DC 5V-2.1A(MAX) Support Protocol: A2DP/AVRCP Using : Drive free Product : High strength fireproof PC Basic Functions: Bluetooth reception, Bluetooth launch, U-disk playback, tfcard playback, infrared remote control, key operation, NFC Support Devices: All kinds of speakers, desktop computer, laptop, TV, power amplifier, projector Colour:black :plastic Package Contents: 1x Bluetooth adapter. 1x 3.5MM cable. 1x 3.5mm-RCA cable 1x -USB cable 1x Remote Control 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.