Velleman-8-channel-RF-Remote-Control-Velleman-K8058-This-8-channel-RF-remote-control-transmitter-works-with-the-8-channel-relay-board-K8056-order-code-70-4182-the-single-channel-RF-receiver-K8070-order-code-70-4183-&-the-RX433-RF-order-code-70-4185-Receiver-module-to-remotely-control-real-world-applications-with-a-range-of-up-to-50m-Velleman-K8058-8-channel-Rf-Remote-Control