Ternary battery L measurement: L03 string to L07 string (power-off memory)Lead-acid battery P measurement: DC12V, DC24V (power-off memory)- battery F measurement: F03 series to F08 series (power-off memory)Custom setting high and low voltage range: DC8-30V. The front is the on/off on, the bais the setting on, please set the s before installing and usingVoltage range: DC8-30V. Working current: Le than 15mA (without charging function). Display mode: LCD screen. USB output: QC2.0, QC3.0, maximum output 18W (5V-3.4A, 9V-2A, 12V-1.5A). Typec output: QC2.0, QC3.0, maximum output 18W (5V-3.1A, 7V-2.4A, 9V-2A, 12V-1.5A) accuracy: ±1%Refresh speed: 500ms/timeInstallation size: 58.5mm x 36.5mmAppearance size: 61mm x 40mm x 22mmMode descrtion On the main page, pre and hold the on/off on for 2 seconds to enter the mode setting page, and then pre and hold the basetting on for 2 seconds to exit the setting page and return to the main page.Mode 1 -- lead acid P setting;Mode 2 -- Ternary L setting;Mode 3 -- FeLiF setting;Mode 4 -- custom high and low voltage settings;Mode 5 -- low voltage alarm setting (alarm when the voltage is lower than this );Mode 6 -- backlight time setting;Notice:There are two kinds of batteries (ternary L and F), let me tell you the difference; first, fully charge the battery first, the saturation voltage of a series of ternary batteries is DC4.2V, and the saturation voltage of a series of batteries is DC4.2V. It is DC3.6V; for example: the saturation voltage shows 29.4V (7 strings), this is the ternary battery, and then select the s according to the setting mode of the ternary battery.Screen color:green/Blue/Colour:blackMaterial:plasticPackage Contents:1 X Battery power 1 X liner />Screen color:GreenColour:blackMaterial:plasticPackage Contents:1 X Battery power 1 X lineOnly the above package content, other products are not included.Note: Light reflection and different displays may ca the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.