Parameter Voltage measurement range: DC 8-100V Working current: <=15mA Display mode: LCD Accuracy: +/-1% Refresh speed: 500ms/time Dimensions: 61.3*33.3*13.5mm Opening size: 58.5*28.5mm Battery type 1. Ternary lithium battery "L" measurement from L03 string to L25 string (power-off memory) 2. Lead-acid battery "P" measurement: DC12V , 36V, 48V, 60V, 72V, 84V (memory for power failure) 3. "F" measurement of LiFePO battery from F04 string to F26 string (memory after power failure) Mode description Mode 1 --Parameter setting: Pb-acid P mode---Ternary lithium L mode---Felithium F mode Mode 2 --Backlight setting: Display 00 OFF, you can set to automatically turn off the backlight after 10S, 30s, 60S, 120S, and set it to OFF to keep it on Mode 3 --Custom mode: custom low voltage and saturation voltage, display 00.0 000, the left figure is the low voltage parameter, the right figure is the saturation voltage parameter Mode 4 --Calibration accuracy: the factory has been calibrated, if the user needs to calibrate again, it must be set with DC 12V power supply Note:there are two kinds of lithium batteries(ternary lithium L and LiFePO F), teach you to lithium distinguish; first, fully charge the battery, the saturation voltage of a string of ternary batteries is DC4.2V , and a string of LiFePO batteries the saturation voltage DC3.6V, for example: the saturation voltage displays 84V(20 strings), this is a ternary lithium battery, and then select the parameters according to the setting mode of the ternary lithium battery Setting structions before product use : Please refer to the manual for detailed operation Package included: 1 * Battery voltage meter 1 * cable (Red for "+" , Black "-") Product Show: