Features: 1.Dustproof and waterproof: Dustproof and IPX5 waterproof, Double-eared split design, single and double ears are free to wear. 2.Automatically pair: Will automatically pair, power on after taking out from the 280mAh charging box. 3.One button control: One button control easily to turn on/off, play/pause/switch music, hands free calling to driving, working, meeting, running. Specifications: Color: Black Bluetooth Version: V5.0 Bluetooth Distance: 10m Charging Time: about 1-2 hours Standby Time: about 80 hours Music Time: about 3 hours Talking Time: about 4 hours Audio transmission format: HFP/A2DP/HSP/AVRCP Earphone Battery: Polymer Lithium Battery 45mAh Battery Box Battery: Polymer Lithium Battery 280mAh Working Voltage: 3.2 - 4.2V Charging Voltage: DC5V Frequency: 2.4-2.48GHz Horn impedance: 32Ω Horn Bandwidth: 20-20KHz Horn Sensitivity: 105dB Microphone Sensitivity: -42 +/-2db Size: 103 x 103 x 35mm Capacity: 280mah Package included: 1 pair of Mini TWS Earphones (left and right ears) 1 x 300mAh Charging Box 1 x USB Charging Cable 1 x User Manual 4 x Ear caps