The interface expansion board specially designed for Raspberry Pi can extend five groups of 2x20 pin headers to your Raspberry Pi, so as to connect to multiple Raspberry Pi expansion boards for various experiments.Based on the Raspberry Pi interface design, it can be directly inserted or connected through a cable5 groups of 2x20 pin headers are extended outside to facilitate access to multiple Raspberry Pi expansion boardsOnboard USB external power supply interface, no longer worry about insufficient power for connecting multiple boardsThe front is marked with a clear pin function silk screen, which is convenient for wiring.The connection pads are reserved on the back, and the connection pins can be changed by soldering to avoid pin conflictsNote: Before connecting different expansion boards, it is necessary to check whether the pins of the expansion board conflict with each othercolor:BlueMaterial:PCBsize:183 x 65mmPackage Contents:1 x Stack HAT1 x Flat wire 40PIN1 x 2x20PIN long pin header1 x RPi copper pillar package (4PCS set)Only 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.25957. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! ! !