Product Name: City Qingqi smart flash helmet
Helmet material: EPS + PC
Head circumference (CM): 54-58 (m) 57-61 (L)
Dimensions (mm): l: 275 W: 214 H: 159 (m)
Length: 282 width: 224 height: 160 (large)
Lighting effect: flash lamp, tide lamp and flash lamp
Battery: 3.7v455mah
Endurance: 26-36 hours in light mode
Standby time: about 180 hours
Charging time: about 3 hours
Electrical parameters: DC 5V / 1A
packing list :
①SH50 smart helmet x1
②Magnetic charging cable x1 
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