1、Double button design, easy to set up, can be set in just a few seconds. 2、Equipped with a switch, you can turn off the power, no power consumption after turning off. 3、Accurately display the battery power percentage, voltage, and intuitively grasp the battery usage status. 4、When the power value is lower than or equal to 20%, the backlight flashes an alarm. 5、Compatible with lead acid battery, lithium battery, iron lithium battery which can be set by yourself. Features: Double button design, easy to set up, can be set in just a few seconds. Equipped with a switch, you can turn off the power, no power consumption after turning off. Accurately display the battery power percentage, voltage, and intuitively grasp the battery usage status. When the power value is lower than or equal to 20%, the backlight flashes an alarm. Compatible with lead acid battery, lithium battery, iron lithium battery which can be set by yourself. Specification: Material: PCB/HTN Light Color: White Light, Blue Light, Green Light (optional) Display Range: 8-100V Applicable Battery Voltage: 12-84V Compatible Battery: Lead acid battery, lithium battery, iron lithium battery (can be set by yourself.) Display Mode: LCD Product Size: Approx. 6x 3.3x 1.4cm / 2.4x 1.3x 0.6inch Package List: 1 x Display 1 x Connection Line