1, DIN Rail Mount IoT Power Relay Module for Raspberry Pi, with the module you can easily extend Raspberry-Pi projects to IoT/industrial control applications. Support for Raspberry Pi 1 Model A+, Pi 1 Model B+, Pi 2 Model B, Pi 3 Model B, Pi 3 Model B+, Pi 4 Module B, Pi Zero or Pi Zero W ( NOTE: the item not include Raspberry Pi). 2, Support DC 5V or DC 7V ~ 32V power supply. 3, Relay action LED indication corresponds to each channel. Support pin jumper chose control signal from Raspberry or external signal. 4, 8 channels SPDT power relays. Contact Rating (each channel): 125VAC/12A, 277VAC/10A or 30VDC/10A. 5, FR-4 glass fiber PCB. High quality fireproof nylon material DIN rail mount carrier, can support width 35mm / 32mm / 15mm rail. Datasheet: https://www.czh-labs.com/tmp/madeimg/datasheet/d-1332.pdf