The pair of Headphones are BT5.0 chip, support single and binaural freely switch and touch control. IPX5 waterproof, it is suitable for sports wear. Features: 10mm graphene speaker, DSP enhanced sound, silicon microphone, HiFi music experience. Flexible and adjustable anti-skid ear hook, three points of stress make stable and comfortable wear. Single and binaural freely switch, USB interface for convenient charge. Electric quantity display, humanized design. BT5.0 chip, faster and stable transmission, low power consumption. Touch control of volume, music, calls and voice assistant. IPX5 waterproof, waterproof coating, no fear of sports and sweat. Specifications: Material: Silicone Color: Black BT Version: BT5.0 Working Voltage: 3.2V~3.4V Headphone speaker: 8mm Transmission Distance: 10m Call Time: 4-5h Play Time: 4-5h Charge Time: 1.5h Supported System: All BT enabled devices and mobile phones Battery Capacity: Headphones: 50mAh Charge Box: 450mAh Item Size: Headphones: 53 * 43mm / 2.09 * 1.69in Charge Box: 73 * 45mm / 2.87 * 1.77in Package Weight: 120g / 4.23ounces Package Size: 117 * 117 * 51mm / 4.61 * 2.01in Packing List: 2 * BT Headphones 1 * Charge Box 1 * USB Cable 1 * User Manual