?【30 Ringtones & 8 Welcomes Doorbell Rings】Welcome / doorbell / alarm / color light / lighting model. The receiver comes with 30 different ringtones from melody sounds to simple basic buzzer for personal preferences., ?【Welcome Buzzer Monitor】The owners can use the doorbell to be alerted when people enter or leave. Use it to detect visitors through the front or back door. The portable design is easy to install in homes, offices, stores, and can also be used for m, ?【Easy to Install】As for the receiver, no wiring needed, no installation hassles, self-adhesive installation, the detector is wall mounted. Use batteries or micro usb power supply. Before using, please read the manual carefully and put in batteries, ?【Widely Range】The transmission range of sensor detects motion up to 918 feet (280 meters) and detection range of the infrared sensor approximately 2~8m/ 6.6~26ft to effectively keep you alerted. When the movement is detected by the sensor,the recei, ?【Wide Application】Ideal for home mailbox, driveway, gallery, gate, doorway, walking paths, door entrance, apartment, office, hotel, store and many other indoor places, not suitale for outdoor; the motion sensor door chime without waterproof functio
