Moxom WL59 ANC Stereo Wireless...

Product Description Wireless Version: 5.3 Wireless Frequency: 2.4 -2.480GHZ Operation range: 10M Speaker Diameter: 40 mm Impedance: 32Ω±15% Mic Speaker Sensitivity: 103±3dB Battery: 500mAh Music Play: 45H Standby Time: 500H Charging time: 2.5H