Motion Sensor Wireless Alert Secure System Doorbell Alarm for Home (1 Receiver 2 Transmitter) Description: The Wireless Household Alert Security System is an easy-to-install and DIY home security system, which is perfect for your office, apartment or home. Just rest in absolute easy! The driveway alarm provides a solution to alert you the moment someone enters your property. It's convenient and especially, with an affordable price. When the movement is detected, the Passive Infrared (PIR) sensor sends a wireless signal to the receiver unit up to 100m/328ft away. There is 1 ringtone and 2 level volume, and a silent LED flash. We offer 2 combinations of transmitters and receivers, simply choose what best fits you!  Feature: Special design and beautiful appearance. Simple operation, attaching it anywhere you want. Infrared sensor detects motion and sends a signal to the receiver. Wireless installation, just place the sensor at the entrance. Send audible chime sound, alerting you that somebody is approaching.   Specifications: Condition: New Type Options: 1 Receiver + 2 Transmitter, 2 Receiver + 1 Transmitter Color: White Material: Plastic Transmitter: 1x 6F-22 9V battery(Not included) Receiver Power: 2x AA batteries(Not included) Working Range: Up to 100 meters / 328 feet (open field) Transmitting Frequency: 433MHZ Infrared Sensing Distance: 3-7 meters Music: Classic Single "For Elise" Receiver Size: Approx. 6.5 * 3.1 * 9cm / 2.6 * 1.2 * 3.5in Transmitter Size: Approx. 4.5 * 6 * 9cm / 1.8 * 2.4 * 3.5in Weight: Approx. 240g   Follow the steps for usage: 1. Place the correct batteries in the detector in the receiver units. 2. Make sure that the batteries have been put in the proper positions. 3. Mount the detector properly by the front door, window frame, driveway, walk path, backyard or anywhere you need. 4. Then switch on the receiver and adjust the volume to either hi or lo position. 5. Now the remote detective system is operating with the infrared detect technology. 6. Place the receiver in an easy reaching place. 7. When the detector senses motion,the receiver will make an audible sound and the LED light will flash. 8. Please wait for 30 seconds after switching on detective receiver to activate. 9. Please install both units above 3 feet ground level for optimal performance.   Useful Tips: Do not place the detective in areas where the wind will move it. Also try to keep the detective in a clear path to the receiver, so that you can get optimal performance.   Care Maintenance Portion: 1. Importance: please keep the detector receiver in sheltered places to avoid contact of both units from water and direct sunlight. 2. When the LED indicator does not go on, the battery power is either low or dead. At that time you should change the batteries. 3. Clean the detective regularly with a damp cloth to avoid blockage of sensor by washing any small particles. 4. Try to keep it in areas where it will not get wet. In addition, during heavy storms and snow fall, it is recommended that unit should be moved to indoor or in a safe place . 5. Never attempt to take apart the units. 6. When the unit is not in use ,take out all batteries, clean both units and store the units in a dry and cool place. 7. This device is not a toy and should be kept out of reach from children. Package Included: 1pc/2pcs x transmitter 1pc/2pcs x receiver 1pc/2pcs x mounting bracelets 1pc x instruction manual Note: 1. Please allow 1-2cm error due to manual measurement. Thanks 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 standard.