The pair of headphones are auto pairing, touch control and seperated design. IPX4 waterproof, it is suitable for sports and outdoor wearing.Features:BT5.0 chip, quick transmission speed and long transmission distance, lower consumption and wide compatibility.It can be used separately or in pairs, you can also connect two mobile phones separately to meet your different needs.One-key touch control of song, call, volume and voice assistant.300mAh charge box, long battery life for 10 hours.Three-dimensional surround sound, bring you pure music.IPX4 waterproof and sweatproof, not afraid of rain and sweat.Specifications:Material: ABSColor: Black, White, Gray, Yellow, Blue, Dark blue, Pink, Green (optional)BT Version: 5.0+EDRTransmission Distance: 15-25m (no barrier)Response Frequency: 2.4GHZImpedance: 16ΩMusic/Play Time: 2-3hTalk Time: 4hSupport Profiles: A2DP/AVRCP/HFP/HSPBattery Capacity: Headphones: 35mAh Charge Box: 300mAhItem Size: Headphones: 42.5 * 15.6mm / 1.67 * 0.61in Charge Box: 56.1 * 43.8mm / 2.21 * 1.72inPackage Weight: 100g / 3.53ouncesPackage Size: 100 * 100 * 33mm / 3.94 * 3.94 * 1.3inPackage List:1 * Pair of Headphones 1 * Charge Box1 * USB Cable 1 * User Manual a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a