The detection system of this welcome device is very sensitive and will not report false alarms. It can better distinguish visitors and improve the safety of installation sites. The resolution with high accuracy rate can give you a better experience. This welcome device is equipped with a fully automatic infrared sensor, which has high sensitivity and is not affected by light. Therefore, the doorbell can be felt both day and night. Give you all-weather care. The support of this welcome device can be rotated. The rotating bracket makes it easier to adjust the monitoring angle. You can place it anywhere or fix it on the wall. Can meet the needs of any place you want to monitor. This welcome device is equipped with 16 types of infrared music to welcome (available during day and night) with two levels. The first level is welcome, the second level is dingdong and 16 music and alarm sounds (adjustable). A variety of music can meet your individual needs. This welcome device is easy to install, and the installation process does not require a lot of time and effort. When the wireless sensor detects motion, it can accurately and quickly transmit a signal to the receiver., Weight: 0.22487150724 Pounds, Manufacturer: Sonew