Features: Brand new and high quality Supports for RaspberryPi A+ 3A+ B+ 2B 3B 3B+ 4B, the Relays Board gives the ability to control voltage current devices, easily makes normal home appliances become intelligent. JS1-5V-F power relays, loads up to 10Amp/250VAC, 5Amp 30VDC. Terminal blocks: pitch5.0mm/0.197", wire size 26-12 AWG / 2.5mm square, stripping length 7mm/0.28", screw. 2x20 pins expansion pin header, height 10mm/0.39". The cooling fans are designed for active cooling modes, the heat can be discharged in times. LED and fan both have independent switches, you can control the LED and fan separately, it will not bring the dazzing feeling when you use it in the night. Specifications: Material:PCB Size:Approx.84x55x15mm/3.3x2.16x0.59inch Package Includes: 1x Expansion board module with Fan and LED 4x Column 8x Screw( M 2.5x5 countersunk screw) 1x Screwdriver note: 1.Product with electrical plugs are designed for use in the US. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Please check compatibility before purchasing. 2.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item.