And Hold The Key For 2 Seconds To Enter The Setting State: The Mode Light (Battery 1 Type) Flashes, And Number Light Is Always On; Briefly The Key To Select The Battery Type. After Confirming The Battery Type, And Hold The Key For 2 Seconds To Enter Number 2/Voltage Setting (The Mode Light Is Always On, And Number/Voltage Light Flashes) The Button To Set The Battery String Number Or Voltage; Please Refer To The Above Table Option Settings For Details. After Setting, And Hold The Key For 2 Seconds To Save The Data And Return To The Display Of 4 Power Status (Or Wait For 5 Seconds To Automatically Return) In The Setting State, If There Is No Operation Button Within 5 Seconds, The Power Automatically Return To The Normal Display. Attention: 1. The first time the product is powered on, the default is 3S voltage of ternary lithium battery. 2. In the normal display state, if there is no operation key within 10 seconds, the product automatically shut down, display and enter low power consumption. You can manually the key briefly to close the display and enter low power consumption; When the product is turned off, the key briefly to turn it on and display the power. Colour:As Shown Material:ABS Size:4.6 x 1.5cm Package Contents: 4 x LED Battery Display Panel 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.