Aktivstar Motion Sensor with Sound Alarm for Entrance/Home and Commercial Motion Sensor,Security Alarm,Portable Presence Detector,（White）.

• Entry alert: home or business 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 mailboxes, garages, driveways and more.
• Motion sensor distance:The detecting distance of the infrared device is 2-8 meters.The remote control distance in the open area is up to 280 meters, which can meet the needs of various places.
• Ringtone: provides 36 different ringtone options, from melodies to a simple basic buzzer. Customize your ringer sound according to your preference whenever you want. With 4 levels of volume control, you'll never have to miss a visitor's or customer's entrance.
• Reduce errors: Using ASK Superheterodyne with the same frequency and different code technology, the error rate is only 1/100000, which can effectively avoid mutual interference and misfiring with neighbors.
• Wireless: Wireless wall-mounted installation. The wireless doorbell sensor is battery and plug-in operated for quick and easy use.

Tags: Motion sensor