Item Type: Wireless Audio Adapter_x000D_ Model Number: AC692X_x000D_ For Bluetooth Version: For bluetooth V5.0_x000D_ Support Agreement: RX: A2DP TX: A2DP_x000D_ Working Frequency Range: 2.402GHz-2.480GHz_x000D_ Power Level: Class 2 (Class II)_x000D_ Audio Coding: SBC_x000D_ Working Current: RX22MA TX35MA_x000D_ Built-In Battery: 200MAH_x000D_ Charging Current: About 200MA_x000D_ Charging Time: About 2 hours_x000D_ Endurance: RX7H, TX5H_x000D_ For Bluetooth Distance: >Approx. 10m / 32.8ft (open space)_x000D_ Charging Method: Micro USB 5V/0.5A_x000D_ Input/Output Connection: I2S AUX interface_x000D_ Compatible: For Android/iOS system mobile phone and Pad, for bluetooth speakers or headphones that support A2DP protocol_x000D_ Size of Audio Cable: Approx. 3.5mm / 0.1in_x000D_ Key Functions: (see user manual for details)_x000D_ Turn On/Off:_x000D_ Turn On: Press and hold the button for 3S to turn on, the indicator lights._x000D_ Shut Down: Press and hold the button for 3S under power on, LED lights off and shut down._x000D_ Mode Switching: Can be switched through the mode switch during turn on using._x000D_ Dimension: Size of bare machine: Approx. 44 x 44 x 12mm / 1.7 x 1.7 x 0.5in1The product is simple to connect without any driver or tedious APP download 2This adapter possess beautiful appearance, built‑in rechargeable battery can work for a long time 3Delicate and compact shape, portable wireless designed adapter can be carried around 4Compatible with for Android/iOS system mobile phone and Pad, for bluetooth speakers or headphones that support A2DP protocol 5Lightweight 2‑in‑1 audio transmitter and receiver is perfect for family TV/computer application1 x Wireless Audio Adapter1 x USB Power Cable1 x 3.5mm Audio Cable1 x User Manual