The WAPIR model replaces an existing wall switch - no neutral wire is needed. If fits into a plaster depth (16mm) wall box. The WAPIR model also has a manual override off switch on the front of the plate. The WAPIR requires a permanent live supply, and should only be used in applications where the lights would not be on for more than 12 hours per day. This is to allow its rechargeable battery enough time to recharge itself from the mains supply. The WAPIR is suitable for small offices, meeting rooms, tutoring rooms, etc. The override off button enables the lights to be held off during video presentations, etc. For wall mounting only. Loading up to 6 amps (1500W) of resistive,fluorescent or inductive lighting loads The time lag (before switch off) is adjustable between 10 seconds and 40 minutes Adjustable photocell override, for holding lighting loads off on bright days A few PIR switches can be wired in parallel Ideal for retrofi tting or new build. Designed to replace existing wall switch Continuous monitoring to ensure lights stay on when area is occupied Manual override off switch on front of the plate Up to 6A (1500W) load (including fluorescent lights) Photocell range: 100 to 1000 lux and inactive Fits standard (16mm) pattress boxes Time lag: 10 seconds to 40 minutes in 9 steps Suitable for small offices, meeting rooms, turoring rooms, etc.