Made in China
8ft (Without Barriers) Transmission Frequency: 20-20000Hz SNR (Signal to Noise Ratio): -42±3dB Impedance: 32±15%Ω Music Play /Talk Time: 8Hrs Charging Time: 2Hrs Charging Input: 5V/100mA-1000mA Earphone Battery Capacity: 110mAh (Left ear inbuilt with 1 battery) Standby Time: 250hrs Waterproof Level: IPX7 Waterproof and Sweat-proof Performance Material: ABS+PC Materials Micro USB Length: 26cm/10.02x1.