Brand: Faster Model No: S6 Bluetooth Version: V5.3 ANC Frequency Range: 20-600Hz Battery Specification: 3.7V/300mAh Working Frequency: 2.402GHZ -2.480GHZ Charging Time: 2h Working Time: about 30 h Noise reduction value: -20 ± 3db Charging Voltage: 5V/1A Warranty: 1 Year