The Simplehomenet EZIO40 has four independently controlled relay outputs that will operate normally opened or normally closed contacts. The 4 dry-contact relay outputs allow you to control low voltage 120 Volt AC (up to .5 Amps) or 24 Volt DC loads. Each relay can be linked individually or with other the other relays on the device as a responder to a group command from an INSTEON controller. The device also has a built-in powerline interface and acts as a repeater of powerline INSTEON signals. Additionally, a programmable timer can be set on each relay to force an off condition providing momentary action from 1 sec to 255 minutes. The simple press of a button from your INSTEON KeypadLinc, RemoteLinc or from your cell phone through a SmartLinc, you can switch loads such as large relays, furnace heaters, blowers, chimes, momentary pushbuttons and more, the possibilities are endless.INSTEON Compatible The EZIO40 Controller is fully INSTEON compatible. INSTEON is a powerful home-control networking technology. INSTEON messages are transmitted throughout your home both wirelessly and through the home's existing wiring. All INSTEON messages are confirmed and repeated by INSTEON devices in the network, contributing to the outstanding reliability and performance of INSTEON products. X-10 compatibility The EZIO40 also works with legacy X10 products. If you have an existing X10 network, the Controller works with your X10 products and provides an upgrade path to an INSTEON network. Do More With Software The on-board memory allows you to set timers to trigger events on the outputs to last for 1 to 255 minutes and a free software download is available for easy programming. Download the free SimpleHomeNet Utility Suite software.