Ezviz Alarm 4-Piece Sensor Kit Wi-Fi PIR Human Motion Detector Open/Close Contact Sensor for Door/Window SOS Emergency Butto

【Security at Fingertips】Know and be notified by using the EZVIZ App. You can receive mobile alerts on all detected activities. Feel free to set your sensors on a time schedule, or manually arm or disarm the whole system whenever you stay out of sight.
【Central Hub A3】Supporting wired or Wi-Fi Internet connection, the A3 Gateway works as the central hub of connectivity. You can manage, arm, and receive alerts from all your connected sensors via the all-in-one EZVIZ App. You can also purchase add-on sensors to scale up the protection.
【Human Detection Sensor T1C】Get informed whenever someone sets foot in your room. Install the PIR motion sensor TIC in your room, and fine-tune the detection coverage using the pet shield included in the kit. This will ensure it only alerts you about human activities, rather than every time your pet runs through the room.
【Open / Close Sensor T2C】Know if your doors are left open, or get opened. Doors, windows, closets – forget about having to check and re-check to confirm they’re shut. If anyone forcibly breaks in, the home gateway will set off a loud alarm, and a mobile alert will reach your phone immediately.
【Smart Button T3C】Use the smart button in two ways – switch on and off your entire sensor system, or press it to send an emergency alarm. Use the peel-and-stick method to place it anywhere within your reach – you can even carry it in your pocket.