Item Specification:Features: Basics, Low Latency, Sweatproof, With Mic, Deep BassInterface: Type CWireless Version: 3Driver Unit: 10mmEar Coupling Style: In-ear (Insert)Impedance Range: up to 32 ΩPrinciple of Sound Production: DynamicNoise Cancelling: Noise Cancellation for Voice CallType: In-ear, Neckband EarbudsMaterial: ABSPower Supply: RechargeableBattery Type: UN 3480