• With USB/SD card slot to play music
• RMS: 8W max
• Frequency responses: 100Hz to 15kHz
• Speaker: 3 inches, 4Ω
• Power supply: 3.7V DC/2,200mAh lithium battery
• Working temperatures: charge: 0 to 45°C; discharge: 20-55°C; storage:-5-35°C
• Charging time: 5 to 7 hours
• Distortion: <1% (1W)
• Microphone input sensitivity: 50mV
• Main unit weight: 300g
• Main unit dimensions: 87 x 42 x 99mm