This versatile 7 day digital timer module is ideal for use in any appliance which requires automation. It can be configured to switch up to 8 different times during a 24 hour period. In addition, they can be programmed to operate on a wide variety of days. eg. daily, week days only, weekends only, every second day, or selected group of days.Switch-on and switch-off times may be set for each program. ie allows different ‘on’ duration for each program. 8 single duration programs per day ie: 56 programs per week.The timer has three modes of operation. Includes ‘always on’ and ‘always off’ override modes, which will ignore all programmed events. The mode of operation can only be changed when power is applied to the switch.In the event of a power failure, the switch retains its program data via an internal battery.For power backup of programmed times a 3V CR2032 lithium battery cell is provided.Note: As this model suits 240V AC power connection it must only be installed by a licensed electrical contractor.