... :CY-D28Product size:15*3cmColor:silver-greyLED quantity:18pcsSwitch3 ON-OFF switchBettery type:LIR2032,120mAHCharging type:dynamo for power ... generationApproval:CE&Rohs1.Using a high brightness LED lamp 18,service life up to 50000hours2.Energy saving, environmental ... 4,5battery or rechargeable batteries,AC transformer,car power supply,the computer USB interface,laptop computer,HUB4.Three gears ...