RPi Relay Boards Enable Pi to Control High-Voltage and High-Current Devices and Make Common Domestic Appliances Smarter.
Supports for Raspberry Pi A + / B + / 2B / 3B. relay, loads up to 250VAC / 5A, 30VDC / 5A.
Onboard LEDs for indicating relay status. Photo link isolation, prevent interference from high voltage circuit.
Relay control jumper, ensures to the relays by custom pins other than the standard pins.
Comes with development means, including examples in wiringPi, WebioPi, shell, python, and bcm2835.

Specification:
Condiiton: Brand
For Raspberry Pi GPIO interface: For connecting Raspberry Pi
Relay screw terminal: For connecting target devices
Relay indicator:
LED on: relay NC is open, NO is closed
LED off: relay NC is closed, NO is open
Power indicator
Relay control jumper:
short the jumper: control the relay by standard I / Os used in the example code
open the jumper: control the relay by custom I / Os via jumper wires
Terminal Description:
The expansion board has four terminals, each terminal has three pins for connecting external circuits
Colour: blue
Material: pcb

Package Contents:
1 * Expansion Module for Raspberry Pi