Product Description: Specification: Voltage Measure Range: 5 - 36V (Blue digital display) Shell material: Fire retardant PC Dimensions: 37x15mm/1.46x0.59inch Color: Balck Feature: LED Digital Display: Precise 3-bit LED digital display. Easy to read, real time monitoring of battery voltage. Timely grasp the state of your battery voltage. The words are etched directly onto the product surface to ensure long-lasting durability. Twist-and-Lock system. Mini size and easy to install, great for checking voltage. Adopt retaining nut to fix the voltmeter on the panel for closer connection. Waterproof design, mount in a panel with 1-1/8 hole, 0.25 thick, a nylon retaining nut holds the meter in place. Used to monitor the storage-battery voltage, with reverse connection protection. Universally fits most DC 12V Motorbike Car, Boat, ATV, UTV, Camper, Caravans, Travel Trailer etc. Package Included: 1pc LED Digital Voltmeter