1 Set EU/US Plug Smart Door Bell Motion Sensor Wireless Doorbell Alert Secure System Alarm Doorbell 38 Chimes Door Ring Receiver Description: Bright LED Indicators and a choice of 38 Chimes allow you to customize your alerts. Features: Includes wireless battery operated sensor and plug in receiver,Just 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 from up to 328 feet (100m) away. Alerts you when someone enters your driveway, walking path, doorway or business, such as visitors, vehicles, intruders, animals or kids coming or going. Advanced notice when someone or something enters before they surprise you. Use it to monitor any area inside or outside, its wireless so you can place it anywhere in the house or even take it from room to room. Specifications: Note: Includes 2 plug-in receiver unit and 1 motion sensors or 1 plug-in receiver unit and 2 motion sensors Working Voltage of the Receiver:110V-240V Working Voltage of the PIR Sensor:4.5V (3x AAA batteries,Not Included) Working Range: Up to 328 feet (100 meters) Infrared Sensing Range: Up to 23 feet (7 meters) Receiver Size: 3.14" L x 2.99" W x 1.29" H (80 x 76 x 33mm) Sensor Size: 3.14" L x 2.32" W x 1.77" H (80 x 59 x 45mm) Packaging Weight: 7.76 ounces (0.22kg) Receiver Switch Settings: Music source: 38 different songs Volume Adjustment: high, middle, low Receiver can be set to sound and silence Sound: sound indicator Silent: indicator light Package Included: 1 x PIR Sensorr (Uses 3 AAA, not included) 2 x Receiver or 2 x PIR Sensorr (Uses 3 AAA, not included) 1 x Receiver 1 x Mounting Accessories kit (needs 1 or 2 screws, not include) 1 x Manual 1 x Retail box Notes: Please note that this not waterproof.Keep it away from rains or cover adequately.