Staircase light timer multifunction. Electronic staircase light timer with low switching noise. The switched on lighting is switched off after the time has elapsed. Functions: timer function with setting range 30 sec. to 10 minutes, timer function with switch-off warning in the last 40 sec., timer function with one hour long-term operation and switch-off warning. Automatic detection of the 3- or 4-wire connection, can be switched on later. Manual switch on the device, automatic or permanent lighting.