Features: 1.COMPATIBLE: Expansion board power relay module supports for RasPi A+ 3A+ B+ 2B 3B 3B+ 4B, capable of controlling high voltage/high current devices, easily making ordinary home appliances intelligent. 2.MAXIMUM LOAD: Power relay board expansion module load up to 10Amp/250VAC, 5Amp 30VDC, PCB material, not easy to deform and damage. 3.40 PINS: Power relay board expansion module pitch 5.0mm/0.19in, stripping length 7mm/0.28in, M2.5 slotted screws. 2 x 20 pin expansion row pins, height 10mm/0.39in. 4.ACTIVE COOLING: The cooling fan is designed with active cooling method, heat is discharged in time, allowing you to run more stable. 5.INDEPENDENT SWITCHES: LED and fan have independent switches to control the LED and fan separately, which won't bring harsh feeling when using at night. specification:Item Type: Power Relay Board Expansion Module with Dual Cooling Fans Material: PCB Support: for RasPi A+ 3A+ B+ 2B 3B 3B+ 4B Load: Up to 10Amp/250VAC, 5Amp 30VDC LED: Automatic Color Changing LED Fan: Built in PackageList: 1 x Relay Board 1 x Screwdriver 5 x Screw 5 x Nut NoteThis product may require an adapter or converter for use at your destination. Please check compatibility before purchasing.