Imagine if you could automatically switch your security/premises light on in the night and off in the morning. Imagine you could automatically switch your water heater on at about 5.00am in the morning and off at about 7am without you lifting a finger. This possibility is now a reality with this 7 day programmable timmer. You can automate the on/off process of your security lights water heater and virtualy any electrical/electronic appliances that runs on 220-240v AC. You can create up to 17 on and 17 off with the device. It comes with a clear installation manual with wiring diagram.