1. 45W two-way fast charging: support PD/QC full protocol, charging and discharging are efficient and fast, saving time. 2. Wide compatibility: suitable for 2-6S lithium batteries, flexible to meet the needs of a variety of DIY charging treasure 3. Multiple safety protection: Built-in overcharge, over-discharge, short circuit protection, to safe and reliable use. 4. Efficient energy management: Intelligent regulation of output and input, enhance battery life, energy saving and environmental protection. 5. DIY friendly design: modular structure, easy to assemble, suitable for DIY enthusiasts to customize the charging treasure Input voltage: 4.5-25V; can be connected to 2-6S batteries Product ripple: Less than 9MV Module applicable: 3.65V/4.1V/4.2V/4.3V/4.35V/4.4V various specifications of the battery Such as: 4.2V 18650/polymer/lithium ternary lithium battery/lithium iron phosphate, large monomer can be connected in parallel with multiple 18650s. Support AFC fast charging protocol Support FCP fast charging protocol Support PD3.1 input and output fast charging agreement Support fast charging can also be used to charge tablets Integrated QC2.0/QC3.0/QC3.0+ output fast charging protocols Use matters: The motherboard received first connected to the charging head test, look at the display status, to confirm that there is a display and then assembled due to the lack of batteries, the display brightness change is normal! It's DIY kits, needs to finish by yourself. Color: Green Material: PCB+Metal Package Contents: 1 * Two-way fast charging module 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.