1)Designed for 12V Lead-Acid battery SLA，AGM，GEL，VRLA battery2)5 segments LED indicator， 10% capacity resolution.3)Build-in MCU chip， accurate measure battery capacity.4)Very slim size: 42x22x5mm， Fixed easily: self-sticky bottom sheet.5)Reverse polarity protection.6)Rating Input Voltage:DC6~48V7)Suitable battery type: 12V Lead-Acid battery SLA，AGM，GEL，VRLA battery