It is a Battery Tester/Multifunction Digital Meter, Power supply range: DC5~90V, Current measuring range: 200A, Voltage measuring range: DC0~300V, Capacity measuring range: 0~999AH, Power measuring range: 0~999KW, Electric energy measuring range: 0~999KWH. Application: Suitable for all kinds of batteries, such as Lead-acid batteries, Lithium Polymer batteries, lithium iron phosphate batteries and etc.