1. Supports FOR A+ 3A+ B+ 2B 3B 3B+ 4B, the RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal become intelligent. 2. FOR JS1-5V-F power relays, loads up to 10Amp/250VAC, 5Amp 30VDC. 3. Terminal blocks: pitch - 5.0mm/0.197inch, wire size 26~12 AWG / 2.5mm square, stripping length 7mm/0.28inch, Metric M2.5 slotted screw. 2 x 20 pins expansion pin header, height 10mm/0.39inch. 4. The cooling fans are designed for active cooling mode, the heat can be discharged in time. 5. LED and fan both have switch, you can control the LED and fan separately, it will not bring the dazzing feeling when you use it in the night. Note: Products 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. Material: abs colour: Black Package Contents: 1 x Expansion board module 4 x Copper pillar 6 x Screws 1 x Screw removal tool Only the above package content, other products are not included. Note: Light reflection 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.