Feature:1. Premium Material: The ceiling motion sensor is made from high grade ABS plastic that resists aging and ensures durability, sturdy and strong, providing long lasting usability.2. Adjustable Sensitivity: Featuring a beautifully designed adjustable human motion switch with microwave radar sensing technology, the device has a high sensitivity that ensures stable performance.3. 360 Degree Detection Angle: The self test time of the switch is about 60 seconds, with a red LED alarm indicator and NC/NO alarm output option, dependable and reliable.4. Versatile Placement Options: The sensor can be installed anywhere inside your home, on walls, ceilings, or any preferable location, offering you the flexibility to choose the installment spot.5. Easy Installation: The motion sensor unit is easy to install and user friendly. It is designed to be used conveniently and to fit seamlessly into your existing system.Specification:Item Type: Ceiling Motion SensorMaterial: ABSWorking Voltage: 9V-12VDCCurrent Consumption: 18mA (at DC12V)Detection Angle: 360 degreesSelf-check Time: About 60 secondsAlarm Indicator: Red LEDAlarm Output: NC NO selectable, contact DC28V 100mADimensions: Approx. 106x36mm / 4.17x1.41in (DiameterxHeight).Package List:1 x Switch2 x Expansion Plug2 x Screws