The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent. RPi Relay Board Features Supports Raspberry Pi A+/B+/2B/3B/3B+ High quality relays, loads up to 5A 250V AC or 5A 30V DC Photo coupling isolation, prevent interference from high voltage circuit Onboard LEDs for indicating relays status Relay control jumper, allows to control the relays by custom pins other than the default pins Comes with development resources, including examples in wiringPi, WebioPi, shell, python, and bcm2835 Package Contains: RPi Relay Board ? 1 RPi screws pack (2pcs) ? 1 For more resources you may need, pls contact me via Amazon message, i will send you then via attachment.