Raspberry Pi Relay Board

The RPi Relay Board gives your Pi the ability to control high voltage/high current devices

• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
• 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

More information is available on the website of Waveshare.