INTELLIGENT DESIGN: UPS for Raspberry PI 4B / 3B+ / 3B. Built-in power path management, support side-loading, load high current line compensation function. There are two USB A port power output, and also adds type C output. It provides uninterruptible power for the Raspberry Pi to make your Raspberry Pi still work while moving, and its design is so smart that you can get rid of troubled of a mass wire.You can check the Wiki link in the Product guides and documents at the bottom of the page.MULTIPLE PROTECTION: Support output overcurrent, overvoltage, short circuit protection; input overvoltage, overcharge, overdischarge, overcurrent discharge protection and machine overheat protection. Safe and reliableUSE AND NOTE: This product belongs to the power supply device. Please keep it out of the reach of children. Please strictly refer to the instructions for the UPS product, install the battery first, then connect the UPS to the Raspberry Pi. Please do not reverse the battery. If the battery polarity is reversed, it will directly burn the power management chip of the device. Do not add any Components by yourselfFAST CHARGING SUPPORT: Support FCP, AFC, SFCP fast charge protocol maximum, support 18W protocol, 20W inputFUNCTION UPGRADES: Support 4.2V 4.35V 4.4V 4.5V lithium battery, Raspberry Pi power supply side current, voltage, power monitoring, Note: Different types of batteries cannot be mixedMaterial:Plastic + Metalcolour:blackPackage Contents:1 set x Expansion BoardOnly the above package content, other products are not included.Note: Light shooting 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.About UsWe provide the good product with the best price,we support Wholesale/Drop Shipping Order1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.About Shipments1.We will send out the orders ASAP once your payment is completed normally.2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.About After-sale ServiceWe are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.About Feedback1. Please check the package and item when you get carefully to make sure there is no problem.2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.3. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! ! !