100% brand new and high quality Features: After testing, it will not affect the WIFI signal. Increasing the large Cooling column allows for better heat dissipation. Increase the power cooling column to bring better heat dissipation to your for Raspberry Pi 3B/3B+. No longer worry about overheating. There is no need to install a fan. It also provides perfect heat dissipation. Durable, hard, long-lasting rust-free, wear-resistant, and can be well protected to your for Raspberry Pi 3B/3B+. All ports and slots of the case can fit perfectly with for Raspberry Pi 3B/3B+. Specifications: Size: approx. 9.1x6.5x3.6cm/3.58x2.56x1.42in Material: Aluminum alloy Color: black Package Includes: 1 x Aluminum Alloy Cooling Case 1 x Screw Set 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.