High quality: Special design and beautiful appearance Easy to use: Simple operation, fixing it wherever you want Easy to install: The infrared sensor detects movement and sends a signal to the receiver Easy to operate: wireless installation, simply place the sensor at the entrance Ideal for indoor and outside: send an audible sound, alert you that someone is approaching The security system Wireless Home Alert is an easy-to-install, do-it-yourself home security system perfect for your office, apartment, or home. Rest with ease Driveway alarm provides a solution to alert you whenever someone enters your property. It's practical and above all, with an affordable price. When motion is detected, the passive infrared (PIR) sensor sends a wireless signal to the receiving unit up to 70m/300ft away. Package Included: Receiver Size: Approx. 7.2 * 2.4 * 7.7cm / 2.8 * 0.9 * 3in PIR Sensor Size: Approx. 5.8 * 3.9 * 7.6cm / 2.3 * 1.5 * 3inch Package included: 1 x PIR sensor 1 x receiver Hi-Fi speakers: High quality chips: stable quality assurance without false alarms Imported infrared probe: imported probe with high precision and high penetration Multi-channel quality inspection: control quality to eliminate defective products Wide detection range: wide detection range from 0 to 8 meters Features: Condition: New Receiver operating voltage: 110V-240V PIR sensor working voltage: 4.5V3 AAA batteries Plug: EU plug Working range: up to 70 meters Infrared detection distance: 3-7 meters Color white Material: plastic Follow the steps of use: 1. Place the appropriate batteries in the detector. 2. Make sure the batteries have been placed in the correct positions. 3. Properly mount the detector near the front door, window frame, driveway, walking path, yard or any other place you need. 4. Then turn on the receiver and adjust the volume to hi or lo position. 5. Now the remote detection system works with infrared detection technology. 6. Place the receiver in an easily accessible location. 7. When the detector detects movement, the receiver emits an audible sound and the LED indicator flashes. 8. Please wait 30 seconds after turning on the detective and receiver to activate it. 9. Please install both units above 3 feet from floor level for optimal performance. Details that require special attention p> 1. Importance: Please place the detector receiver in a sheltered location to avoid both units coming into contact with water and direct sunlight. 2. If the LED light is off, the battery is low or exhausted. You should replace the battery at this time. 3. Clean the detective regularly with a damp cloth to prevent small particles from blocking the sensor. 4. Try to put it somewhere where it won't get wet. Additionally, during blizzards and heavy snowfall, it is recommended to move the equipment indoors or to a safe location. 5. Do not disassemble the equipment. 6. When the machine is not in use, please remove all batteries, clean both units and store them in a dry, cool place. 7. This equipment is not a toy and should be placed out of the reach of en. Note: 1. Please allow 1-2cm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as the standard. Dear customer, please rest assured to buy without worrying about the suitability of the plug. We will provide you with an adapter according to the standards of different countries and ensure its normal use.