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AmmetersFeatures:Longer service lifeTouch switch button, feelDual IC integrated circuit control, more stable product is suitable for lead-acid 12V, 24V, 36V, 48V (8-70V) product is suitable for 3.7V lithium series multi-platform, 2 string, 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 stringS1:%/V Rotate display in 2sPower percentage and voltage are displayed in turn recurrently and automatically;S2:Inactivity sleep in 10sAutomatically sleep after capacity display for 10 s, save power, press function key to wake up power display for 10 seconds;S3:Turn on backlightPower display turns on or off power backlight;S4:Show logo(Applicable to small icon)Logo icon is located in underface of symbol on left side of LCD, turn on and show logo;S5:Discharge mode selectionPower displays two kinds of discharge curve, different environments convert to select appropriate discharge modes;Setting procedure:1. Disconnect module power supply, press and hold setting button until powering power module. Display shows current power setting parameters;2. Press setting button to select P / L / F ,(P = 12V lead acid, L = 3.7V lithium , F = 3.2V lithium iron phosphate );3 press function key to set number of string, according to function keys and set key up or down to choose number of batteries in series;4. Press function key for a long time to enter advanced setting interface, use setting key to select S1-S5, enter key to select or cancel current mode;5. Reenergize power after setting. power automatically saves setting data.E.g. 10 lithium power, turn on power percentage and voltage automatic rotation display (S1 mode): Disconnect display module power, press and hold setting button, power power module, press setting button for a short time to select L, press function key to select 10, press function key for a long time to select S1 and re-power.Specifications:Voltage Range: 6V-73V: PlasticDimension: app.61.3mmx33.3mmx13.5mm/2.41''x1.31''x0.53''Cable length: app.30cm/11.81''Housing color: Black Ammeters ASIN B0H3MJHXFM Color One Color Model SFDRUEU Brand Name SFDRUEU Part Number SFDRUEU Manufacturer SFDRUEU Item Dimensions 0.39 x 0.39 x 0.39 inches