Battery life is expected to last between 12-18 months so you shouldn’t find your changing those often. The Light switch timer is a mechanical device is a battery powered device that does not require direct access to the mains electrics to work. The back of the sensor (where the batteries go) is a bit tricky to get off and would have preferred one which can also have a light flash with no sound as an option.

We have a range of sensors to complement your doorbell and alert you to movement inside or outside your home. The red flash on the sensor is probably enough to warn an intruder off before they actually get over the top of the fence. If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. The light switch timer is a battery operated product and therefore does not use any of the mains electrics.Our sensor uses optimum integrated passive-infrared (PIR) technology with a 16 ft 60° scope to detect any movement and help create a geo-fenced secure area.

This one so far has been a little gem, it has been in place for about a month now, and through all the wind, rain and frost has not yet triggered a false alarm. If one of the random programmes conflicts with an existing programme then that particular programme takes precedent in that instance only. Allows the user to easily move the light switch timer to different switches and create different lighting illusions so no visible pattern is detectable. The replacement also seems to be a much better upgraded version on the one I'd originally bought so hoping this one lasts.

The receiver can be connected to multiple sensors including our doorbell so the same chime will alert you to a visitor on your property and to your door. The high-quality reliable doorbell, the pre-paired arctic air doorbell uses a high-powered lithium battery that ensures good transmission strength to cope with multiple solid brick walls and double-glazed doors. The one thing that I’m not very keen on is the bright red of the display, this would have been much nicer in blue but then this is for safety and not really to look at, lol. A simple battery powered motorised switch mechanism which can be used for single,2 or 3 pole panel by adding or removing the wheels within the assembly, took minutes to install, slightly longer to set times as there are many options,now installed it works, note the motor operation is audible.