Waveshare 5V 3-Channel Relay Module Expansion Board Breakout Shield HAT Kit for RPI Raspberry Pi Zero 2 W WH 2W 3 The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent._x000D_ RPi Relay Board Features_x000D_ Standard FOR Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards_x000D_ High quality relays, loads up to 5A 250V AC or 5A 30V DC_x000D_ Photo coupling isolation, prevent interference from high voltage circuit_x000D_ _x000D_ Color: blue, black_x000D_ Material: PCB_x000D_ Onboard LEDs for indicating relays status_x000D_ Relay control jumper, allows to control the relays by custom pins other than the default pins_x000D_ What's on the RPi Relay Board_x000D_ FOR Raspberry Pi GPIO interface:for connecting Raspberry Pi_x000D_ Relay screw terminal:for connecting target devices_x000D_ Relays_x000D_ Photocoupler:PC817_x000D_ Relay indicator_x000D_ LED on: relay NC is opened, NO is closed_x000D_ LED off: relay NC is closed, NO is opened_x000D_ Power indicator_x000D_ Relay control jumper_x000D_ short the jumper: control the relays by default I/Os used in the example code_x000D_ open the jumper: control the relays by custom I/Os through jumper wires_x000D_ _x000D_ Package Contents:_x000D_ 1 x RPi Relay Board_x000D_ 1 x RPi screws pack_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light shooting 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_