Features: 1. Works for 12V/24V, 36V, 48V (optional) battery 2. Designed to monitor the power level of battery during charging or discharging 3. Provides instant battery status for effective charging management 4. LED flash indicates low charge warning 5. Displays 10-segment LED bar graph 6. Memory function to recall quantity of electricity 7. High reliability, easy to install and operate Specifications: Material: Plastic Color: Black Operating Voltage: 12V/24V, 36V, 48V (optional) Operating Current: 20mA nominal Capacity Indicator: 1 Red + 2 Yellow + 7 Green LEDs Accuracy: +/- 0.5% Operating Temperature: -20°C to +85°C Package Weight: 40-42g Package Included: 1 x Battery Indicator 1 x Set of Accessories Note: Connect to the appropriate voltage as marked on the back of the battery indicator. Incorrect voltage may damage the device or cause malfunction.