Smart Motion Sensor, Wifi Wireless Security Alarm, Home Security Pir, Siri WIFI MOTION SENSOR: Wifi PIR motion detector alarm, No hub required, via "Tuya Smart" or "Smart Life" APP to control. When there is movement detected, the alert notifications will be pushed to your phone, you can also track the history of sensor activities, be aware of what's happening at home even when you're away.(Note: 2.4GHz Wi-Fi network only) THE NEW UPGRADE WIFI DETECTOR: The Upgraded sensitive infrared sensor can be powered by the included USB cable(included) . More stable to receive alert.Long-term power supply, say goodbye to power outages. NOTE: No battery, need to be plugged into the power supply The PIR MOTION DETECTOR WITH 4 ARMING MODES: You will like the flexibility in the alarm modes (?Sound Light Mode ?Silent Mode ?Matte Mode ?Secret Mode). You can even set up a ?secret mode? to alert you that motion has been detected without actually sounding the alarm itself, just sending out the push notification with an alarm sounding on the phone app so you don?t miss it. COMPATIBLE WITH ALEXA SMART LINKAGE: Pir motion sensor can be used with Tuya Smart, Smart Life, Amazon Alexa for home automation. It can also be linked with other smart wifi devices. For example, when you open the door, the sensor will be triggered and the light will turn on automatically. ACCURATE ALARM EASY INSTALLATION: Tuya motion detector, 128 detection angle, 40 feet detection distance. SENCKIT wifi smart motion sensor is easy to use and install, install it everywhere in your home, bedroom or office.