... read and write function, Applied to device inspecition,vehicle identification,bill-anti-fakeand logistics mangement Main parameters ... voltageDC3.7-4.2V (built-in rechargeable lithium battery)Battery capacity1700 mAhCharging voltage110-240V AC,50/60Hzpower consumption≤ ... to electrical, water supplier, railway, and coal mine.Vehicle identification: road charge, parking management.Bill Anti-fake: ...