This LCD display supports batteries(Li-ion/LiFePo4/Lead-acid), supported voltage renge is 9V~100V, (12V/24V/36/72V/80V) can display battery capacity(Coulomb meter statistics, accurate capacity) current (Hall reads current), charge and discharge time, battery persentage, battery power, Product parameters: Product name: coulomb meter Working voltage: 8~100v Current range: 50A Capacity range: 0~99999Ah Working current: 7.5mA The current after closed backlight: 3.5mA Voltage precision: 1%(1 C) Current precision: 1%(1 C) Capacity precision: 1%(1 C) Size: 79X43X27mm Cut hole size: 76.5X39.5mm LCD size: 49X24mm Backlight color: green Working temperature: -10~65 Wire length: 15cm Colour:black Material: ABS Package Contents: 1 x Hall Coulomb Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.