Description Easy, Fast, Wire Free Installation Infrared sensor detects motion and sends a signal to the receiver. Chose from 36 Ringtones with Bright LED Light. Sensor is wall mountable. It can detect movement in the surrounding areas - driveways, front porch, gates, home, sheds, offices, walkways, swimming pools, stores, etc. And trigger alert to the linked receiver. It provides an added level of security and safety to your property and loved ones. 36 Ringtones 5 Welcomes Doorbell RingsWelcome / Doorbell / Alarm / Color light / Lighting Model. The receiver comes with 36 different ringtones from melody sounds to simple basic buzzer for personal preferences and 5 welcome ringtones for retail store. Widely RangeWorking Range up to 918 feet (280 meters) between receiver and transmitter allowing you to place it a good distance from the receiver to warn you of arrival and departure of family members, unwanted guests or solicitors, or anyone who visits your home or business ExpandableFlexible design according to your actual needs. You can choose the quantity of transmitter and receiver as you like, which can be freely matched and set special lights or ringtones with each other. Each receiver of this motion sensor detects alarm can work with 32 motion sensors and 8 remote at most. MULTIPURPOSEIdeal for front doors, window frames, mailbox alert, walking paths, entry alert chime, pet monitor alarm 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.