Security Welcome Chime Doorbell. Features: Shop Keeper in Time, Anti-thief in the Night. Place the PIR Motion Sensor at the Entrance to Your Driveway or Anywhere You Want to Be Alerted to Motion, It Detects Movements and Sends a Wireless Signal to the Portable Receiver from Up to 918 Feet (280m) Away. 5-in-1 Multi-mode (Welcome/ Doorbell/ Alarm/ Colorful Light/ Night Light). 8 Chord Music Chip, 40mm Big Horn, 36 Chime Melodies, Remember the Last Setting of Melody and Volume Level Once Powered Off. Colorful LED Lights, Adjustable Brightness, Distinguish Multiple Entrances by Different Colors. 4 Stages Adjustable Volume (Loud/ High/ Middle/ Low) from 113 ~ 25dB. The Receiver Can Learn from Up to 32 Wireless Sensors Like PIR Motion, Magnetic or Vibration Sensor As Well As Up to 8 Remote Controllers. Low Battery Indication. Ideal for Front Doors, Window Frames, Driveways, Walking Paths, and Anywhere in Your Home You Want to Be Alerted to Motion. Also Great to Alert Business Owners That Are Working in the Back, or out of Sight, to Customers Entering Their Store. Specifications: Kit Configuration: Door/Window Sensor Power: Battery/ USB Output Number: As the Picture Shown Video Interface: No Display: No Alarm Type: The Alarm Model Number: KS-SF20R Password Keyboard: No Arming Type: FR Remote-controller Connection Type: Wireless Zone Number: As the Picture Shown Volume: 113 ~ 25dB (Loud/ High/ Middle/ Low) Wireless Transmission Range: 280m/ 918ft in Open Space Mode: Welcome/ Doorbell/ Alarm/ Flash Light/ Night Light Working Frequency: 433.92 MHz Working Temperature: -10 ~ 60 Operating Humidity: