Characteristic: 1.Bluetooth Version: V5.3 2. Battery Capacity: 180Mah * 2; Charging Time: About 2 Hours 3.Using Time: 40 Hours Listening To Music, 35 Hours Calling 4. Material: Pc + Silicone 5. Size: 93Cm; Weight: 30G 6. Waterproof: Ipx4 7. Can Be Used For 6 Hours After Charging For 10 Minutes (Music)