1. The digital battery monitor is suitable for 7-100V (12V, 24V, 36V, 48V, 60V, 72V, 84V) LiFePO4 batteries, lead-acid batteries, ternary lithium batteries, NiMH batteries, and 18650 power batteries. 2. Compatible with motorcycles, two-wheel electric vehicles, three-wheel electric vehicles, cars, and other battery-powered vehicles to measure remaining voltage percentage. 3. IPX7 waterproof rating with a fully enclosed shell, suitable for outdoor and humid environments. 4. Red wire indicates positive; black wire indicates negative. 5. Features buzzer alarm and temperature display. Users can set high and low voltage alarms. Short press the "M" button to switch between voltage and temperature (Celsius) readings. 6. Includes power-off memory function. Supported battery types: 1. Ternary lithium battery: Measuring range from 3S to 20S, with power-off memory function. 2. Lead-acid battery: Measuring range from DC 12V to 24V, 36V, 48V, 60V, 72V. 3. LiFePO4 battery: Measuring range from 4S to 24S, with power-off memory function. 4. Custom settings available for batteries not listed above. Parameters: Voltage range: DC 7-100V Working current: Less than 10mA Voltage accuracy: 0.1V (0.1% - 0.5%) Display mode: LCD screen Measurement accuracy: 0.5% Measurement speed: 2 times per second Screen type: Multicolor display Color: White + Black Material: Plastic Size: 64 x 36 x 15.3mm Package Contents: 1 x Battery tester Note: Light reflection and differences in display screens may cause slight variations in the color of the item as shown. Measurement error allowance is +/- 1-3cm.