Features: 1.The product is simple to connect without any driver or tedious APP download 2.This adapter possess beautiful appearance, built‑in rechargeable battery can work for a long time 3.Delicate and compact shape, portable wireless designed adapter can be carried around 4.Compatible with for Android/iOS system mobile phone and Pad, for bluetooth speakers or headphones that support A2DP protocol 5.Lightweight 2‑in‑1 audio transmitter and receiver is perfect for family TV/computer application specification:Item Type: Wireless Audio Adapter Model Number: AC692X For Bluetooth Version: For bluetooth V5.0 Support Agreement: RX: A2DP TX: A2DP Working Frequency Range: 2.402GHz-2.480GHz Power Level: Class 2 (Class II) Audio Coding: SBC Working Current: RX22MA TX35MA Built-In Battery: 200MAH Charging Current: About 200MA Charging Time: About 2 hours Endurance: RX7H, TX5H For Bluetooth Distance: >Approx. 10m / 32.8ft (open space) Charging Method: Micro USB 5V/0.5A Input/Output Connection: I2S AUX interface Compatible: For Android/iOS system mobile phone and Pad, for bluetooth speakers or headphones that support A2DP protocol Size of Audio Cable: Approx. 3.5mm / 0.1in Key Functions: (see user manual for details) Turn On/Off: Turn On: Press and hold the button for 3S to turn on, the indicator lights. Shut Down: Press and hold the button for 3S under power on, LED lights off and shut down. Mode Switching: Can be switched through the mode switch during turn on using. Dimension: Size of bare machine: Approx. 44 x 44 x 12mm / 1.7 x 1.7 x 0.5in PackageList:1 x Wireless Audio Adapter1 x USB Power Cable1 x 3.5mm Audio Cable1 x User Manual