1. The difference between split port and the same port: split port means that the positive and negative electrodes for charging and discharging should be separated; The charging current at the same port is as as the discharging current, and the charging and discharging are in the same place. 2. Without equalization and with equalization: Equalization refers to using resistors to discharge high voltage cells during charging, and for low voltage cells to charge up the voltage to achieve the consistency of voltages and improve the performance of the entire batteries. Color: As Shown Material: PCB Package Contents: 1 x Lithium protective board 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.