Connected doorbell and videophone -automatic doorbell wireless alert security commercial office welcome chime 1 infrared + 2 receiver Highlights generic brand automatic doorbell wireless alert security commercial office welcome chime 1 infrared + 2 receiver Description: - Two-way PIR chime doorbell, 8m(max) infrared sensor distance, 100x15 sensor area, 280m working distance, when customers approach, it says hello, and goodbye when they leave, you will not miss customers, otherwise, customers will feel welcome; - With USB port, it is an effective commercial chime for supermarket promotions, security warnings, store discounts; - Audio MP3 player, support music single cycle and list loop, 36 loop melodies; -113db, decibel and clear sound, keep working efficiently all night long; welcome and security alert chime in one; Perfect for door side and entrance of hotel, stores, mall, office, warehouse, factory, villa; -Easy to install with guide manual, battery operation, low power 1W; - The alarm can last 30 seconds when someone intervenes; -Available to remote control; specification: -Material: ABS plastic -Launcher: 3xAAA (not included) -Receiver: 3xAA (not included) -Power: 1W Detection distance: 8m Playback angle: 100x15 Working distance: 280m -Audio Format: MP3 -Launcher: Approx. 82x45x74mm / 3.29x1.77x2.91 inch -Receiver: Approx. 116x64x26mm/4.57x2.52x1.02inch Remote Control: Material: ABS plastic Size: Approx. 60x40x20mm/2.36x1.57x0.79inch Black color Left: Turn on/Switch mode Right: Turn off Middle: V+/V-, music button Battery: 12V/27A (not included) Package includes: 1 Set Infrared Doorbell ( Remote Control Sold Separately) Note: 1.Due to manual measurement, there is a slight color and size difference between the above item and the actual item; 2.Please keep the detector and receiver in sheltered places to avoid contact of the two units form water and direct sunlight; 3. Clean the detective regularly with a damp cloth to avoid the sensor being blocked by dirt or any small;