1. Based on the development board design of for Sunrise X3, it matches the size and positioning hole of for Sunrise X3, which is simple and easy to 2. The aluminum +cooling fan double overlay scheme is used for more efficient heat dissipation3. It is convenient to stack external expansion boards, lead out all GPIO interfaces, clear pin silk screen identification, and facilitate external expansion and wiringProduct name: cooling fan expansion boardSupport equipment: for Sunrise X3 supply: DC 5V inputRated speed: 5000 10% RPMGeneral: reserved IO port controlInterface: terminal 2.54mmSize: 65.00x 49.90 mmColour:blackMaterial:ABSPackage Contents:1 x cooling fan expansion boardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.