Universal voltmeter type: lead-acid battery DC supports 12/24/36/48/60/72/84V, lithium battery DC supports 3-24 strings, iron-lithium battery DC supports 4-24 strings, which is convenient for you daily needs. EASY TO USE: It has a built-in switch to turn off the power, and it wont consume any power when turned off. The power supply voltage is manually switched by default; the two-button design makes the setting simple and efficient, and it only takes a few seconds to complete the setting. CLEAR DIGITAL DISPLAY: The fuel gauge indicator is designed with PVC waterproof screen protector, with bright backlight and low working power consumption, allowing you to easily read the results on the display from different angles. Safe: The voltmeter is small, lightweight and has a water-resistant finish. A 30cm/11.8in power cord is included for easy connection. Reverse connection protection design, reverse connection will not burn. Specification: Working voltage: 12-84V Display: Capacity/Voltage Backlight: As shown Material: ABS