Features:<br>A New Generation of Bluetooth 5.0, faster and more stable.<br>Dust-proof and IPX5 waterproof, Double-eared split design, single and double ears are free to wear.<br>Will automatically pair, power on after taking out from the 280mAh charging box.<br>True wireless Bluetooth headset, left and right channel separation, Automatically connected, both ear can be used separately.<br>One button control easily to turn on/off, play/pause/switch music, hands free calling to driving, working, meeting, running.<br>One to two connections, can be connected to two mobile phones at the same time.<br>Intelligent compatibility: support all Bluetooth mobile phone, tablet, notebook, QQ music, movies, etc., universal all mobile phone.<br>Specifications:<br>Color: black<br>Bluetooth version: V5.0<br>Bluetooth distance: about 10m/32.81ft<br>Charging time: about 1-2 hours<br>Standby time: about 3.5 hours<br>Music time: about 2.5 hours<br>Talking time: about 3.5 hours Audio transmission format: HFP/A2DP/HSP/AVRCP<br>Earphone battery: Polymer Lithium Battery 45mAh<br>Battery box battery: Polymer Lithium Battery 280mAh<br>Working voltage: 3.2 - 4.2V<br>Charging voltage: DC5V<br>Frequency: 2.4-2.48GHz<br>Horn impedance: 32Ω<br>Horn bandwidth: 20-20KHz<br>Horn sensitivity: 105dB<br>Microphone sensitivity: -42 +/-2db<br>Package size: about 150x77x28mm Packing List:<br>1xTWS Bluetooth Earphones (left and right ears)<br>1x280mAh Charging Box<br>1xUSB Charging Cable<br>1xUser Manual<br>4xEar cap<br>