This is a PIR sensor from Eterna which can be fixed onto any of the LED battens from their BATLED range enable the BATLED to come on when they detect movement. It has a detection range of 3-6 metres an multiple settings to adjust the time it comes on and for how long. This includes having it on for just the day or night time and the adjustable objects come in 30 seconds 3 minutes 5 minutes and 8 minute increments.