Allight&reg; Wireless Entry Alert, Door Chime for Shop/Store Entrance (Visitor Alarm), White, 16 Melodies 16 selectable melodies, pleasant chime, automatically announces customers/visitors with chime sound Wireless entrance alert, highly adjustable, easy installation, great flexibility Attractive, compact design, sounds when the door is opened or visitors pass the device Portable or wall mount, no wiring needed, easy to remove from wall mount, great for travel Great for shops, offices, homes, never miss a visitor or delivery again