5-IN-1 MODE: Home security alarm / welcome signal / doorbell / colored light / warning light. HIGH SENSITIVITY: Our wireless home alarms are equipped with high-sensitivity infrared sensors for fast and accurate motion detection. The detection range is 2 to 8 meters. EASY WIRELESS INSTALLATION: No wiring required. Simply attach the doorbell's infrared sensor to the wall (with tape or screws), and it will detect nearby motion, whether on a driveway, on a porch, front door, shed, office, sidewalk, around a pool, in a store, etc. WIDE DETECTION RANGE: With a range of up to 280 meters between the receiver and the transmitter of the front door alarm, you can place the sensor at the ideal distance from the receiver for effective monitoring. The independent 40 mm speaker delivers a maximum sound level of 113 dB. 36 RINGTONES AND 5 WELCOME SIGNALS: The receiver offers 22 different ringtones, ranging from captivating melodies to a simple, basic chime, for optimal personalization, as well as 8 welcome signals for businesses. WIDE APPLICATION: The outdoor motion detector is suitable for mailboxes, driveways, walkways, gates, doors, passages, apartments, offices, hotels, shops, and many other indoor locations. The doorbell with motion detector is not waterproof and is not intended for outdoor use. It can also be used for child safety and to remind elderly people to come home. TWO POWER OPTIONS: The motion detector can be powered via a USB port or batteries. The main unit is powered by 3 AAA batteries and the sensor by 3 AAA batteries. Replace batteries every 5 to 7 months. Note: Batteries and USB cable are not included.