"Speaker: Full frequency speaker 4 ohms 3W*2
Speaker size:52x52x32mm
Rated impedance: 4Ω±15%
Rated power: 3W
Frequency range:F0-20KHZ
Characteristic sensitivity:84dB±2dB
Resonance frequency: 400HZ±20%
Harmonic distortion: 5%
Power supply (adapter): DC 5V/3A
Battery:Built-in 3.7V/2000mAh
Usage time: 2 to 3 hours
Power indicator (LED): Power on - white light; Charging - red light;
Low battery status: beep for 2 minutes/time
Charging time: fast charging ---1.5-2 hours, slow charging --- 2-3 hours
Charging interface: TYPE-C interface
Supported audio formats: MP3 WAV WMA FLAC APE
Sound adjustment: high, middle and bass adjustment; accompaniment, reverberation, recording adjustment; microphone volume adjustment; speaker volume adjustment
Function keys 8 keys
Sound effect button: 7 keys
Special effect keys: 7 keys
Bluetooth switch: support
Accompaniment input: 1 channel (3.5 ports)
Condenser microphone input: 2 channels (3.5 ports)
Headset output: 1 channel (3.5 ports)
Headphone output: 1 channel (3.5 port)
Live broadcast interface: 2 channels (3.5 ports)
OTG interface: 1 channel (TYPE-C port)
Charging interface: TYPE-C port
Analog audio output: LT/RT, stereo
Dynamic range 1kHz:80dB
Crosstalk:70dB
Signal-to-noise ratio:85dB
Output level (Vrms):Vrms(1.0~2.0V 10kR)
Headphone output power: 5 mW x2CH
Speaker output power (rated value): 3W x2CH
Speaker output power (peak to peak): 5W x2CH
Frequency response:5MHz(<-3dB)
Colour: Black 
Product material: ABS plastic
Product size: 350*108*92mm
Packing size: 382*133*106mm, 1.5kg
carton size: 565*410*425mm, 15pcs/ctn, G.W: 24kg
Packing List: Sound bar speaker*1, dual Microphones, charging cable*1,Live line*1"