Features:Bt 5.0 earbuds with charging case, convenient to take in pocketBreaking the master-slave limit of traditional TWS headsets, the left/right headphones are free to switch at any timeRemove any earphone during binaural call, automatically switch to unicast modeAutomatically paired with both earbuds and automatically switched, no master-slave constraints, seamless switching between left and rightErgonomic design, mini size earbuds, wearing with no pain or discomfort after long time using.Specifications:Material: ABS+ PCColor: Black, White, Red (optional)Wearing Type: Half-earMicrophone: YesBt Version: V5.0Transmission Distance: 10mImpedance: 32Frequency Response: 20-20kHzBattery Capacity: Charging box: 500mAh, 3.7VEarphone: 38mAh*2, 3.7VCharging Time (h): 1hWorking Time (h): 3-4hCharging: USB Type-CWaterproof: IPX5Charging box size: 54 * 46 * 23mm / 2.1 * 1.8 * 0.9inEarphone size: 40 * 16mm / 1.6 * 0.6inPackage size: 125 * 75 * 35mm / 4.9 * 3.0 * 1.4inPackage weight: 110g / 3.9ouncePacking List:1 * Pair of Earphones1 * Type-C Charging Cable1 * Manual