Characteristics:1. Dustproof and waterproof: dustproof and IPX5 waterproof, two-ear split design, single and double ears are free to wear.2. Automatically pair: auto pair, power on after taking out of the 280mAh charging box.3. One button control: easy one button control to turn on / off, Play / Pause / Change music, hands-free calls for driving, working, meeting, running.4. Smart compatibility: support all Bluetooth mobile phones, tablets, notebooks, QQ music, movies, etc., all universal mobile phones. Description:A new generation of Bluetooth 5.1, faster and more stable.True wireless bluetooth headset, left and right channel separation, automatically connected, both ears can be used separately.One to two connections, it can connect to two mobile phones at the same time. Specs:Color: blackBluetooth version: V5.1Bluetooth distance: 10mCharging time: about 1-2 hoursStandby time: about 80 hoursMusic time: about 3 hoursTalk time: about 4 hoursAudio Transmission Format: HFP / A2DP / HSP / AVRCPHeadphone battery: 45mAh polymer lithium batteryCase Battery: 280mAh Polymer Lithium BatteryOperating voltage: 3.2-4.2VCharging voltage: DC5VFrequency: 2.4-2.48 GHzHorn Impedance: 32ΩHorn bandwidth: 20-20KHzHorn sensitivity: 105dBMicrophone sensitivity: -42 +/- 2dBSize: 103x103x35mmCapacity: 280mah Package Included:1 Pair of Mini TWS Earphones (Left and Right Ears)1 x 280mAh charging box1 x USB Charging Cable1 x User Manual4 x ear pads Notes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item.2. Due to different personal measurement techniques, there may be a physical error of 1-3cm. Thanks! a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a