Product name: ultrasonic mosquito repellent bracelet  
Product model :M20  
Function: ultrasonic wave mosquito repellent ,Electronic clock, temperature measurement  
Product color: black, white,pink  
Packing size :45*60*100mm  
Weight :53.5g  
Rated capacity :90mAh  
Charging time :≈30 minutes
  Rated working output :34Hz-70KHz  
Working hours :150 hours  
Rated input voltage :5V  
Rated input current :1A  
Pure physical, no chemical composition