Mini Loudspeaker For Teachers Gadget For Giving Classes For Meetings

Product information:
Frequency response: 150Hz- 12kHz
Peak power: 5W
Speaker impedance: 40
Total harmonic distortion: gah≤5% 1kHz @ 4R, 3W
Signal-to-noise ratio: 77dB (A-Weighted) @ 1W 40
Battery Type: lithium ion battery
Battery Specification: 3.7V/1300mAh
Charging Method: DC 5V 1A
Charging time: about 2 hours
Usage time: about 8 hours
Operating voltage range: 3.3V-4.2V
Product Size: 193.1x60.7X60.7mm
Vibration pickup: backpole Electret
Directivity: Single pointing
Frequency response: 60Hz-16KHz
Sensitivity: -47 soil 3dB (0dB = 1V/Pa, at1KHz)