1. Ternary lithium battery L measurement: L03 string to L07 string (power-off memory) 2. Lead-acid battery P measurement: DC12V, DC24V (power-off memory) 3. Iron-lithium battery F measurement: F03 series to F08 series (power-off memory) 4. Custom setting high and low voltage range: DC8-30V 5. The front is the on/off button, and the back is the setting button. set the parameters installing and using 1. Voltage detection range: DC8-30V 2. Working current: Less than15mA (without charging function) 3. Display mode: LCD screen 4. Model: 6140 5. Temperature display 6. USB output: QC2.0, QC3.0, maximum output 18W (5V-3.4A, 9V-2A, 12V-1.5A) 7. Typec output: QC2.0, QC3.0, maximum output 18W (5V-3.1A, 7V-2.4A, 9V-2A, 12V-1.5A) 8. Detection accuracy: 1% 9. Refresh speed: 500ms/time 10. Installation size: 58.5mm x 36.5mm 11. Appearance size: 61mm x 40mm x 22mm Mode On the main page, press and hold the on/off button for 2 seconds to enter the mode setting page, and then press and hold the back setting button for 2 seconds to exit the setting page and return to the main page. Mode 1 -- lead acid P setting; Mode 2 -- Ternary Lithium L setting; Mode 3 -- FeLiF setting; Mode 4 -- custom high and low voltage ; Mode 5 -- low voltage alarm setting (alarm when the voltage is lower than this parameter); Mode 6 -- backlight time setting; Backlighting Colour:White Material:plastic Package Contents: 1 x Battery power tester 1 x Wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.