2 working modes available for choice: only LED Light flashing or both sound and LED flashing. 3 levels of volume adjustment: High or Medium or Low. 38 ringtones for choose. Receiver working effective range is up to 70 meters. The PIR motion detection distance is 3-7 meters. It can be successfully used for your home, office, store, hotel or other buildings. Ideal for alerting business owners who work in the back or out of sight when customers come in store. It can also be used as a signal when animal is ready to enter or leave. Applications: entry alert, intruder alarm, passageway alarm, bug detector, car alarm (indoor), security monitor warehouse, power supply closet alarm, garage and tool shed monitor, mailbox sensor, front door or walkway detection. Package includes: plug-in electronic receiver, motion detector PIR and English instructions. Product Description Wireless Doorbell Electric Door Chime Kit with 1 Receiver and 1 PIR Motion Detector Sensor Alert Visitor Security Alarm Never worry about surprised visitors again with our wireless driveway alert. This wireless infrared motion sensor doorbell alarm is easy to use and set up. Bright LED indicators and a choice of 38 chimes allow you to customize your alerts. Specifications: Receiver operating voltage: 110V-240 V PIR Sensor Working Voltage: 4.5V (3 AAA batteries) Package Contents: 1 * Receiver 1*PIR Sensor 1*Instruction Manual Receiver Switch Setting: 1) Music Source: 38 different music optional , use the external "music" button to finish. 2) The volume adjustment function: there are three kinds of volume (high, medium, low) for you to choose. 3) Adjust sound and silence Installation steps: 1. Place the correct batteries (3 AAA batteries) in the sensor, make sure the batteries have been placed in the correct positions. 2. Properly mount the sensor near the front door, window frame, driveway, walkway, backyard, or anywhere you need it. 3. Turn on the receiver and adjust the volume to the correct position. 4. Now the remote sensing system works with infrared sensing technology. 5. Place the receiver in an easily accessible place. 6. When the sensor detects motion, the receiver will emit an audible sound and the LED light will flash. 7. Please wait 30 seconds after turning on the sensor and receiver to activate. Home Security Driveway Detector Wireless Motion Detector for Door Windows Working range: up to 70 meters Infrared detection distance: 3-7 meters Receiver size: 76*80*33 mm PIR sensor size: 80*59*45mm Packing size: 10*9*9cm Weight: 0.16kg NOTE: Do not place the sensor finder in areas where the wind will move it, also try to keep the sleuth in a clear path to the receiver.