<p>Supports for A+\/B+\/2B\/3B\/3B+\/4B\/5\/Zero\/Zero W\/Zero 2W</p> <p>High quality relays, loads up to 5A 250V AC or 5A 30V DC</p> <p>Photo coupling isolation, prevent interference from high voltage circuit</p> <p>Standard rail mount bottom case</p> <p>Onboard LEDs for indicating relays status</p> <p>Relay control pin selection jumper, allows to control the relays by custom pins other than the default pins</p> <p>Reserved control Interface, allows to work with controllers like PLC</p> <p>Comes with development resources, including examples in wiringPi, bcm2835, python, python-bottle (webpage control), and crontab (cron job)</p> <p>Power supply voltage:5V</p> <p>Trigger signal:3.3V\/5V</p> <p>Relay channels:8-ch</p> <p>Contact form:SPDT-NO,NC</p> <p>Closed current:6mA (per channel)</p> <p>Connector:screw terminal block</p> <p>Mounting hole size:3.0mm</p> <p>Due to different batches, the appearance, color and printed words of the product , which not affect the use.</p> <p>Colour:Blue</p> <p>Material:PCB</p> <p>Size:232 x 72 (mm)</p> <p>Package Contents:</p> <p>1 * Relay Extention Board</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>