Features 1、Double buttons design, simple and efficient setting, only takes a few seconds to set up. 2、Equipped with a switch. The display can be turned off, and no power will be consumed. 3、Accurately display the percentage of battery capacity and voltage, intuitively grasp the battery capacity status. 4、When the electric quantity is less than 20%, the backlight will flash to alarm. 5、Adopting high Specification craft, sturdy and durable to use. Specification Features: 1. Double buttons design, simple and efficient setting, only takes a few seconds to set up. 2. Equipped with a switch. The display can be turned off, and no power will be consumed. 3. Accurately display the percentage of battery capacity and voltage, intuitively grasp the battery capacity status. 4. When the electric quantity is less than 20%, the backlight will flash to alarm. 5. Adopting high Specification craft, sturdy and durable to use. Specification: Material: PCB/HTN Product Size: Approx. 6.1x3.3x1.3cm/2.4x1.3x0.5in Display Range: 8-100V Applicable Voltage: 12-84V Compatible Battery: Lead-acid battery, lithium battery, lithium iron battery (can be set up by yourself) Display Method: LCD display Light Color: Blue, White, Green (optional) Package List: 1 x Display 1 x Connecting Line