Parts List: 1 x Battery Monitor 1 x Rack Highlight description: Applicable Battery: ①3-20 series lithium battery pack, ②4-24 series lithium iron battery pack, ③12 V, 24 V, 36 V, 48 V, 60 V, 72 V, 84 V lead acid battery. The product also supports custom modes in the 9.5-100 V range Display: This product features a digital display LCD with a reinforced acrylic waterproof screen that displays both battery voltage and remaining power, allowing users to clearly view battery status Power Off Memory: After power off the voltmeter, the function Settings will remain in the state before power off Low Voltage Alarm: When the battery level is below 10%, the low voltage alarm will work (battery icon blinking). This reminds you that the battery needs to be recharged Waterproof: This voltage current capacity tester is IP67 water resistant, which means it can resist splashing in most situations Detailed description: Description: When the battery level is below 10%, the low voltage alarm will work (the battery icon flashes), which alerts you that the battery needs to be charged. The calibration screw hole allows the voltmeter to be adjusted to zero bias by simply twisting the screw for increased accuracy and convenience. Key Feature: Display: This product features a digital display LCD with a reinforced acrylic waterproof screen that displays both battery voltage and remaining power, allowing users to clearly view battery status. Power off Memory: After power off the voltmeter, the function Settings will remain in the state before power off. Specification: Product Name: Battery Monitor Material: Plastic Size: Dial diameter 5.9 CM thickness 17.8 CM Voltage measurement range: DC 7-100 V Working current: ≤15 MA Note: 1. There may be slight color differences between the product picture and the actual item. We will do our best to display the color as accurately as possible. 2. Please allow slight dimensional discrepancies due to manual measurement. Power Off Memory: After power off the voltmeter, the function Settings will remain in the state before power off Applicable Battery: ①3-20 series lithium battery pack, ②4-24 series lithium iron battery pack, ③12 V, 24 V, 36 V, 48 V, 60 V, 72 V, 84 V lead acid battery. The product also supports custom modes in the 9.5-100 V range Display: This product features a digital display LCD with a reinforced acrylic waterproof screen that displays both battery voltage and remaining power, allowing users to clearly view battery status Low Voltage Alarm: When the battery level is below 10%, the low voltage alarm will work (battery icon blinking). This reminds you that the battery needs to be recharged Waterproof: This voltage current capacity tester is IP67 water resistant, which means it can resist splashing in most situations