iCORE VSM99 Mini bluetooth speaker and microphone set

Speaker Parameters
Bluetooth version : 5.1 
Speaker Diameter : 57mm
Audio output power : RMS 5W
Operating Voltage : 3.7V
Frequency range : 100Hz-18kHz
Reverb : Echo sound effect reverb
Charging time : About 4 hours
Rated power consumption  : 2.5W (DC5V/0.5A)
Battery cappacity : 1800 mAh, 18650 internal battery
Power adapter : DC5V/1A (can be used with mobile phone charger)
Dimensions : 164*66*84mm
Weight : 452g

Microphone parameters
Type : Dynamic microphone
Operating voltage : 3.7V
Frequency range : 100Hz-18kHz
Battery capacity : 500 mAh, 14500 built-in battery
Power adapter : DC5V/1A (can be used with mobile phone charger)
Charging time : About 2 hours
Rated power consumption : 1.5W (DC5V/0.3A)
Dimensions : Diameter 45*158mm
Weight : 136g