This LCD display supports batteries(- or LiFePo4 or Lead-acid), supported voltage renge is 9V-100V, (12V or 24V or 36 or 72V or 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: 400A Capacity range: 0-99999Ah Working current: 7.5mA The current after closed backlight: 3.5mA Voltage precision: 1 percent (1 C) Current precision: 1 percent (1 C) Capacity precision: 1 percent (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.