TOUCH SCREEN SWITCH: Voltmeter with touch sensor control device, is different from ordinary voltmeters on the market. It can switch between voltage and battery percentage, or turn off to reduce battery consumption during storage. SAFE TO USE: The voltmeter housing with waterproof design, and some reliable safety protection devices. It has over-current, over-voltage, short-circuit protection, good protection for the entire circuit, reliable and safe use. REAL-TIME VOLTAGE DISPLAY: Digital voltmeter display accurate LED 3-digit digital display, real-time monitoring of battery voltage status. With blue LED indicator light, the numbers of various angles are clearly visible, and it is clearly displayed at night. SIMPLE INSTALLATION AND COMPACT: There are two voltmeters in the package, each with 2 insulated terminals and 2 screws. It can be directly installed with twist-lock fasteners, mini size is easy to install, and very suitable for monitoring voltage status.