Features: Brand new and high quality For RPi relays boards enable to control high-voltage and high-current devices and make common domestic appliances smarter. Supports for RPi A+/B+/2B/3B. High quality relays, loads up to 250VAC / 5A, 30VDC / 5A. Onboards LEDs for indicating relays status. Photo link isolation, prevent interference from high voltage circuit. Relays control jumper, ensures to the relays by customs pins other than the standard pins. Comes with development mean, including examples in wiringPi, WebioPi, shell and bcm2835. Specifications: Material:Plastic Type:4 Channel/6 Channel Package Includes: 1x Relays Module note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.