Size: OD 95mm*H140mm
Working voltages: 3.3-4.2V
Stand-by current: 10mA±3 mA
Indicator: OD3.0 red and blue LED
Built-in Mic: OD4*1.5mm-32dB
Speaker: OD57*25mm, 4Ω3W
Micro input voltage: DC 5V: ≥500mA, input power: ≥2.5W
Polymer Li-ion battery: 821843 620mAh with protection board, after charging and discharging 300 times capacity: ≥85%*620mAh
Frequency responses: 120-17,000Hz
Charging time: 2.5hrs
Working time: ≥7H (fully charged with volume 70%)
Effective distance: without any block: ≥10M
Appearance: white, pink and blue
Waterproof level: IP65