Features: Monitor your battery capacity and voltage with ease using this dc-battery meter with alarm, suitable-for a wide range-of batteries including lead-acid and-lithium-ion. Featuring a front-setting switch-key and bright lcd-display with backlighting, this durable abs-meter is easy-to use and install. Ideal-for anyone who needs-to keep tabs on their battery's power-levels, from boaters and rv-enthusiasts to diyers and-mechanics. Whether you're out on the water or working in your garage, this battery meter makes it easy-to monitor your battery's status-and avoid unexpected power loss. With its versatile compatibility and convenient alarm function, this battery meter is an essential tool for anyone who relies on their battery-powered equipment. Specifications: Material:ABS Size:Approx.6.1x3.3x1.5cm/2.4x1.29x0.59inch Color:Black Net Weight:30g Input/Output voltage: 8-100V The back of the potentiometer calibration design is equipped with a calibration hole, which can accurately calibrate the voltage and-make it safer-to use. Pluggable connectors are convenient and can be replaced quickly. Package Includes: 1x Battery Capacity Voltage Meter note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.