Features_x000D__x000D_- Color: Black._x000D_- Material: Plastic._x000D_- Size: About 9.8 x 5.8 x 1.3 cm/3.86x2.28x0.51inch._x000D_- Made of premium material, very sturdy and durable._x000D_- Extremely portable, lightweight wireless transmitter and receiver is an wireless audio solution for a wide range of situations and uses._x000D_- Transmitter mode: wirelessly streams audio from your non- TV, home stereo system, or CD player to your headphones or speakers._x000D_- Receiver mode: wirelessly streams audio from your -enabled phone, tablet, or computer to your wired stereo, speakers, or headphones._x000D_- Widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc._x000D__x000D_ Specifications _x000D__x000D_Support: A2DP, AVRCP, HFP, SPP HID_x000D_Receive working current: ≤ 43MA_x000D_Transmitting working current: ≤ 60MA_x000D_Standby current: ﹤ 18MA_x000D_Transmission rate: 21 (Mbps)_x000D_Working frequency: 2.4 (MHz)_x000D_Wireless standard: 5.0._x000D_Built-in battery: polymer 600MAH_x000D_Charging current: 300MA_x000D_Endurance time: ＞8H_x000D_Wireless distance: ＞10M (open space)_x000D_Charging method: Micro USB 5V / 0.5A_x000D_Output connection: 3.5MM stereo interface_x000D_Input connection mode: 3.5MM stereo interface_x000D_Compatible: Android, IOS mobile phones and PAD, and all audio devices, audio equipment with audio input interfacePacking list: 1 x wireless transmitter/receiver kit