Integrated switch: Easily control power with the onboard switch, no additional components required Dual USB design, efficient performance Efficient power management: Ensures stable and efficient power for your project, improving performance and reliability Compatibility: Perfect for 3 This expansion board is an essential accessory for anyone looking to push the boundaries of their Pi projects with a reliable and easy-to-install power solution Battery capacity: 3800mAH Maximum amplification current: 1.4A No-load output voltage: 5.1V0.1V Standard charging current/voltage: 1.0A 5.0V Battery full charge cut-off voltage: 4.18V-4.2V Colour:Blue Material:PCB Package Contents: 1 x Expansion Board Kit 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.