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