suitable for lithium battery 12v 24v 48v 60v 84v waterproof ip67 capacity voltage meter with backlight lcd and low-voltage alarm 60V, 72V, 84V. This product also supports custom mode in range of 9.5-100V. DISPLAY: The product uses digital display LCD with backlight, equipped with a strengthened waterproof screen, it displays both battery voltage and remain capacity simultaneously, enable users to view the state of battery clearly. POWER-OFF MEMORY: After cutting off the power supply of the voltmeter, the function setting keeps the state before power-off. LOW VOLTAGE ALARM: The low voltage alarm work when battery power is less than 10% (battery flash). This reminds you that the battery needs to be . LOW POWER CONSUMPTION: The voltmeter has a very low power rate, at normal mode, its self-current consumption is below 15mA, while low-power-consumption working mode is below 1mA. CALIBRATION: A calibration screw hole allows to adjust the voltmeter to zero bias by simply twisting the screw for enhanced precision and convenience. EASY TO INSTALL: The voltage meter can be mounted on panel or installed easily with nut and bracket included in the package. WATERPROOF & DUSTPROOF: The voltage meter features a waterproof level of IP67, which means it can resist water splash in most situations. Colour:Black Material:plastic Package Contents: 1 x battery capacity tester 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.4891662125905