1. Multi-interface and more charging protocol 2. Support charging and discharging at the same time. 3. High Efficency and price is low, suitable for DIY or upgrate. Tips:The fast charging board needs to be equipped with a battery with low internal resistance and high current discharge, and a cable with high current. Specification: Chip: SW6201 (SW6106 upgrade board) support charge and discharge at the same time. QC4.0/3.0/2.0 Fast Charging Main Board PD Protocol Android/type C input: 5V-3A 9V-2A 12V-1.5A Type-C output: 5V-3A 9V-2A 12V-1.5A (compatible with PD fast charging) Output (blue USB): 5V-3A 9V-2A 12V-1.5A Circuit board: software board, multiple protection for over impulse, over discharge, short circuit, and overload Before DIY, please confirm that the voltage of the battery is normal between 3.6V-4.2V. The battery cannot be equipped with a protective plate that the internal resistance of the battery is consistent and the voltage is normal. Attention: B+ connect battery+ B- conect battery- Please pay attention to the battery polarity, wrong connection damage the IC. Color:Green Material:PCB Package Contents: 1 * Circuit 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.