ITEM NAME:8 Channel Relay Expansion DC 5V Relay Module Board for Raspberry A9U1. A9F4 F2U0 Description&Preview.Relay is 5V. 1x 8 Relay Expansion Board. High current relay, AC250V 10A DC30V 10A. With fixed screw holes for easy installation. Suitable for various platforms such as 51/AVR/AVR/ARM. You can follow below process to chontact us.