material: plastic/lamp-house format: led light/2pcs led light/1pc currency detector power supply by: cranking the handle mainly use for: illume configuration 1. crust subassembly: assemble by cover, bottom, light cover. 2. dynamoelectric subassembly: assemble by mini brushless electric motor, professional design gear and pull-rope parts. 3. circuit buildup: commutating, filter, manostat, battery mobile phone charge subassembly: assemble by mini electromotor, professional design gear, handle, commutate, manostat, output dc jack. operation principle: current cause by cranking rotational motor, through commutating, manostat, filter, charge for the rechargeable lithium battery, works for the mini currency detector light, led light. (current: 15mah/voltage:3.6v)