1.If you need to turn off information monitoring, please long press the "M" key to enter the background and turn off the information prompt! 2. Battery percentage (100% full voltage and 0% low battery voltage) and OVP (overvoltage alarm), LVP (low voltage alarm) need to be set separately, which can be set to the same value or different values 3. This product is a bidirectional current, with a+symbol for charging and a - symbol for discharging, changed to the direction of the arrow (charging position ← symbol, discharging → symbol) 4. When encountering WiFi connection failure, long press the"M" key to enter the background and select the WiFi reset option 5. The system sound can be turned off or on, long press the "M" key to enter the background settings Before making a purchase, please read this paragraph carefully to avoid any misunderstandings. Thank you! The capacity tested for this product is the total capacity, which is the accumulated data! Whether in charging or discharging mode, if the data is not reset zero, the capacity is accumulated! The battery percentage is calculated based on the fully charged voltage (100% battery voltage) and the cut-off voltage (0% battery voltage). So before each charge or discharge, it is necessary to reset zero the data and test the battery's single capacity! It is not battery charging: capacity add(+), discharging: capacity reduce(-), battery percentage is not calculated based on total capacity (AH) and remaining charge (AH) Colour:Black&White Material:ABS Package Contents: 1set x CNC regulated power supply 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.