World"s smallest z-wave Multi-sensor detects motion, temperature, light and vibrations due to built-in accelerometer. Only 1 3/4 in diameter.;Get alerted immediately on your smart phone, tablet, our email when there is motion detected. Trigger certain lights, activate specific scenes or even sirens if there is a threat;Intelligent Object recognition- Can distinguish between a small pets or person. Adjustable sensitivity and indicator LED to persons liking.;Multi Color LED eye visually display"s motion and temperature per user configuration settings. (LED eye can be turned off. Certain controllers may be required for advanced configuration);Built-in tamper protection alerts user if sensor has been moved and can even be used for Earthquake detection (Fibaro controller may be required for advanced configuration);Z-Wave Certifed Sensor: Cert ID: ZC08-14070006/ Frequency Region: U.S./Canada/Mexico, Z-Wave Library Version: 4.55.00