1. Multipurpose Motion Activated Sensor: Motion sensor alarm and Infrared sensor doorbell is ideal for front doors, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion; motion sensor door chime for business and motion sensor chime also great to alert business owners that are working in the back, or out of sight, to customers entering their store 2. High Sensitivity of Infrared Motion Sensor Sound Alarm: When people or animals approach the acknowledgment space of the motion detector alarm and door chime for business arrive at front doorway ringer, the music is played normally, the volume of the motion sensor door chime and door motion sensor chime for business is up to 85 ± 5 dB, loud and clear, whether or not day or night 3. Motion Doorbell Chime with Swivel Bracket: This infrared doorbell and rotating bracket doorbell may not require any wiring; Likewise this motion detector battery operated alarm and Home security doorbell can be mounted with the included segment, or there is a connection self assertively on the divider 4. Easy to Install and Use: The wireless door chime and motion sensor alarm indoor can be used by installing with batteries; The door alarms for and business door entry chime need three AAA batteries and receiver need three AA batteries to make it work; So motion activated speaker and door bell for business entry is easy to install and indoor motion sensor alarm can rotate to any position you need