Product Name: NFC multi function Bluetooth adapter Product version: Standard/Remote Product Model: M8 Bluetooth Version: Bluetooth V5.0 Battery: 3.7V/500mAh Using Time: Listen to music for about 10 hours and stand by for 30 days Transmission Range: 10m (barrier free) Interface: 3.5mm AUX/2RCA/COAXIAL/OPTICAL Input Parameter: DC 5V-2.1A(MAX) Support Protocol: A2DP/AVRCP Product Dimension: about 92*65*20mm Product Material: High strength fireproof PC Product Weight: Standard version:75g Basic Functions: Bluetooth reception, Bluetooth launch, U-disk playback, tfcard playback, infrared remote control, key operation, digital fiber / coaxial input, NFC Support Devices: All kinds of speakers,desktop computer, laptop, TV, power amplifier,projector Package included: 1x Bluetooth adapter. 1x 3.5MM cable. 1X 3.5mm-RCA cable 1x Micro USB cable 1x Remote Control. 1x User manual.