Note: U-Disk and TF card is ok to play in TX and RX mode both, which is updated compared to other devices. Product Name: Digital display Bluetooth adapter Product version: Standard/Remote Product Model: M5 Bluetooth Version: Bluetooth V5.0 Chip: AC6951C Battery: 3.7V/400mAh(UN38.3) Using Time: Listen to music for about 6-8 hours and stand by for 30 days Transmission Range: 20m (barrier free) Interface: 3.5mm AUX/2RCA/USB/TF Input Parameter: DC 5V-2.1A(MAX) Support Protocol: A2DP/AVRCP Product Dimension: about 73*67*30mm Using Method: Drive free Product Color: Black Product Material: High strength fireproof ABS+PC Product Weight: Standard version:68g Basic Functions: Bluetooth reception, Bluetooth launch, U-disk playback, tf card play, infrared remote control, key operation Support Devices: All kinds of speakers,desktop computer, laptop, TV, power amplifier,projector Package included: 1* Bluetooth receiver transmitter 1* RCA to AUX cable 1* AUX to AUX cable 1* Type C cable 1* User manual 1* Remote control ( if you don't order with remote control option, there is no remote control )