RC Switch with Relay is part of the Pololu line of products. It is a two-channel, high-current relay board that allows one to control two separate loads, such as motors, pumps, valves, fans, and even LED strips. It can be switched via RC (remote control) or by a manual switch. It is ideal for controlling systems at a distance and is compatible with R/C receivers, such as the Pololu 30A transmitters. The controller can be powered with any voltage from 5 to 30V. The relay contacts are rated for up to 60V/10A (per channel) and have been designed to be highly reliable. Each channel also has an input for controlling it in an "active low" fashion with an external signal, such as a microcontroller or an open collector transistor. The board also includes a buzzer for audible confirmation of relay operation.