A timer allows for controlling of your heated bathroom towel rails so that you can simply set you schedule and forget, whilst experiencing warm dry towels.The Eco Timer is a simple timing device designed to go behind the switch plate (not included). The timer operates on a 12 hour schedule meaning it will be on at the same time morning and evening each day of the week. The programmed timer can be selected for a period from 1 to 11 hours and three heat settings can be selected: 50%, 75% or 100%.The timer is operated using the switch, when you turn the timer on it will start to beep, each beep represents one hour, if you want the rail on for 4 hours wait for 4 beeps, switch the timer off and then back on again and it will do another 4 beeps to confirm it has been set for 4 hours. The rail will come on at the time you set it eg 4pm for four hours and then again at 4am for four hours. The Eco Timer is a very cost effective and simple to operate option although it doesn't offer the same user flexibility as a programmable timer.