1, material : ABS
2. how to chargae : use USB power supply
3.speed control mode: three speed control 4.output: 4W output voltage: DC12V 5.input current:0.5A -1A
6.working hours: 3-8H 7.battery : 18650 Li-ion
8.charging time : about 4hours
9. size: 110*80.5*28mm
10. unit weight : 120g not include battery
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