SOUND LIGHT ALARM & APP ALERTS: Wifi motion sensor alarm , "Tuya Smart"/"Smart Life" APP control, No hub required. When it detects any movement, the wifi motion sensor will activate 100dB sound, and it will send you an alert through App at the sametime. Our wifi motion sensor alarm also compatible with Alexa. FOUR ARMING MODES & ACCURATE ALARM : The wireless motion detector has 4 modes(Sound and light/silent/no light/secret mode); According to your daily needs, choose your favorite arming mode. Motion detectors provides an added level of security and safetyto your property. And because of the smart design, it can prevent false alarms or under report from pets under 25KG. TIMING DISARMING AND ARMING: Wifi PIR motion detector alarm features a 90detection and 360flip design, the detection range up to 40 ft. It also has the timing function, You can set the time according to your needs, DIY your home security systems. EASY INSTALLATION & TWO CHARGING METHODS: The wifi smart motion sensor support multiple installation methods such as flat placement and wall fixing. The motion sensor alarm indoor is powered by 2*AAA battery(not included) or USB cable (included).Note:If the alarm is triggered frequently in your installation place, the battery will run out quickly, so we recommend to use the 5V usb adapter to supply power.