ITEM NAME:F9 Bluetooth 5.0 Earphones 350mAh Wireless Stereo Earpieces 2set Description: F9 TWS Mini Bluetooth V5.0 Wireless Sports Headset Earphone 2000mAh Charge Box ,Waterproof Double In-Ear Earbuds Earpieces Headphones ï ¼Å’Built-In Microphone ï ¼Å’ HIFI 8D Stereo ï ¼Å’LED Power Display BT 5.0 brings high data transfer speed, stable connection and low power consumption. TWS Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs. 2000mAh battery boxï ¼Å’you never have to worry about running out of battery on your Headset. It can also be used as a Power bank to charge your phone anytime, anywhere. Hands-free calling ,Built-in mic delivers clearer and more real talking sound, make hand-free call as you like. Automatically pair : Take the earphone out of the charging box, the earphone will automatically turn on, automatically pair, no need to operate, easy to use and convenient. Intelligent compatibility: support all bluetooth mobile phone, tablet, notebook, singing it, QQ music, movies, etc., universal all mobile phone. LED display, visually displaying power in real time. Specification: Bluetooth version: V5.0 Wireless frequency:2.4GHZ Support: HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2 and PBAP 1.0 Charging voltage / current: 5V / 1A Music time: 120 hours, equipped with charging bin Phone talking time: 150 hours, equipped with charging bin Charging time:1-2hours Transmission Distance:10m Speaker impedance: Æ8MM 32ÃŽ © Microphone sensitivity: -42Db Frequency response range: 20-20000Hz Sensitivity: 120dB+/-5dB Headphone battery capacity: 50mAh / single, with protection board Charging box battery capacity: 2000mAh Package Includes: 2Set/4 Piece Mini Bluetooth headphones (left and right) 2 Piece Charging Box 2 Piece USB charging Cable 2 Piece Instruction Manual SKU: DMO0017152219488565.Bluetooth version: V5.0. 2Set/4 Piece Mini Bluetooth headphones (left and right). TWS Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs.