Wireless Receiver: Portable wireless receiver plugs into any standard outlet. The sensor uses 3 AAA batteries (not included). The detection delay between motion sensor alerts is configurable from 15 seconds to 30 seconds, simply place the sensor at the entrance to your driveway and the receiver inside your home. Operational range up to 70 meters between receiver and transmitter, allowing you to place it a good distance from the receiver to notify you of the arrival and departure of unwanted family members, guests or lawyers , or anyone who visits your home or business Ideal for front doors, window frames, driveways, walking paths, and anywhere you want to be alerted of movement. Also great for alerting business owners who work in the back or out of sight to customers entering their store. This easy to use and set up wireless infrared motion sensor door alarm . Bright LED indicators and a choice of 38 chimes allow you to personalize your alerts. Door Chime with Motion Sensor for Business, Wireless Outdoor Doorbell Kit p> Feature: Simply place the sensor at the entrance to your driveway and the receiver inside your home. It detects movements and sends a signal to the receiver up to 7m away. Alerts you when someone enters your driveway, path, door or business, such as visitors, vehicles , intruders, animals or children arriving or leaving. Use it to monitor any area indoors or outdoors, it's wireless so you can place anywhere in the house or even carry it from room to room Home Security Motion Sensor Alarm Detector Operating Voltage from the receiver: 110V-240V PIR sensor working voltage: 4.5 V (3 AAA batteries, not included) Working range: up to 70 meters; Infrared detection range: up to 23 feet (7 meters) Receiver switch settings: Music source: 38 different songs Volume adjustment: high, medium, low The receiver can be set to sound and silent Sound: sound + indicator< /p> Silent: indicator light Receiver dimensions (L x W x H): 80 x 76 x 33 mm Sensor dimensions: 80 x 59 x 45 mm Notes: Please note that it is not waterproof. Keep it out of rain or cover it adequately. Tips: Do not place the sensor detector in areas where the wind will move it, also try to keep the detector in a clear path to the receiver, so you can get optimal performance. Includes 2 plug-in receivers and 1 motion sensor.