--The motion sensor is powered by 3pcs AA 1.5V Alkaline batteries (the package does not included the batteries).
--The motion sensor is weather resistant, will work properly at all the seasons. Working temperature range from -30 to 50 degree Celsius.
--Up to 800 meters long wireless transmission range(ideal conditions), it is a great solution even to monitor the long driveway/large property/and etc.
--Up to 15 meters wide sensor range and 2 adjustable sensitivities(High=15m; Low=10m), ideal for driveways, walking paths, yards, garages, gate, pool and anywhere of your outdoor/indoor property you want to be alerted.
--Advanced wireless transmission technology(FSK+FSHH) to avoid the wireless signal interference from other wireless devices.
--Plug-in receiver has 4 adjustable volume levels and 35 optional melodies, match different melody with different sensor around your property to differentiate where motion is being detected.
--Fully expandable system, up to 32 sensors can be added to the 1 receiver; and 1 sensor can be added to unlimited receivers. (Restart the receivers or sensors will not miss the records)