ITEM NAME:40-pin GPIO Extension Board Module For Raspberry Pi Hat A+/B+/2 Generation A#S Product Description Description: 40-pin GPIO Hat Extension Board Module For Raspberry Pi A+/B+/2 Generation Descriptions: Support to build an extension circuit for HAT, and support for raspberry pie B+/A+/Pi 2. contains debug circuit for HAT, or you can install other specification extensions for HAT. Features: 40P flex cable can be installed. Mark all pin functions, BCM tags, and peripheral multiplexing. Antiskid rubber pad. Specifications: Model: Extension Board Module For Raspberry Characteristic service: debug circuit for HAT Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 1 x Flex Cable 1 x GPIO Hat Extension Board 4 x Sets 2*20 Array 1 x Set Fixed Screws.1 x GPIO Hat Extension Board. Support to build an extension circuit for HAT, and support for raspberry pie B+/A+/Pi 2. contains debug circuit for HAT, or you can install other specification extensions for HAT.