Waterproof shell with a button for switching from Capacity,Voltage and Turn off the screen.Monitoring the battery capacity and voltage by this mini tester.Easy to read the value in dark environment with the green backlightAutomatically turn into sleep mode in 10s for saving the .Suitable for testing the capacity of 37V Lithium Batteries, Lead Acid Batteries and Fe BatteriesWidely used for , motorcycles, scooters, bikes, bank, test equipment, etcSimple connection with reverse protection, won' burn if connect reversely.For checking the remian capacity of batteries, diretly display with battery capacity sign and percentage.Backlight color: GreenVoltage range: 6-63VCircuit load current: 5 - 6mASuitable for: 3-15pcs 37V Lithium Batteries; Lead Acid Batteries 12V, 24V, 36V, 48V; Fe BatteriesColour: Black Material: ABS plasticProduct size: 613*333*135mmMounting hole size: 58*281mmPackage Contents: 1 x Digital LCD Battery Capacity TesterOnly the above package content, other products are not included.Note: Light 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.