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. Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Battery Capacity Voltage Meter