Specifications Display Power Voltage Close the key for cycle Voltage range 8 70V products will display based on the voltage value voltage fluctuations power meter will be follow as the voltage fluctuation Comes with reverse polarity protection can be guarantee use effectively The product is suitable for lead acid 12V 24V 36V 48V can be changes via key specific please see setup instructions as below The product is suitable for 3 7V lithium series multi platform 3 string 4 string 5 string 6 string 7 string and 8 string 9 string 10 string 11 string 12 string 13 string 14 string 15 string can be changes via key detail information please see as below Cable Length 30cmBattery specifications P lead acid L lithium battery F lithium iron phosphate battery Single string battery nominal voltage Lead acid 12V lithium battery 3 7V lithium iron phosphate 3 2V Setup steps Press and hold the setting button to power the battery enter the setting interfaceShort press the setting button to select the battery specification P lead acid L lithium battery F lithium iron phosphate battery Short press the function key to select the number of battery strings the setting key is increased the function key is reduced Long press the function key to set the S mode the setting key selects the corresponding mode and the function key is turned on or off After setting it you can re power it S1 V 2 seconds in turn displayS2 10 second delay offS3 Turn on the backlig