Teissuly Wireless Home Security Driveway Alarm, Entry Alert, Visitor Door Bell Chime with 1 Plug-in Receiver and 1 PIR Motion Sensor Detector Alert System, Quality Sound and LED, 38 Melodies Wireless Motion Sensor Alarm Home Security Doorbell Alarm Alert System Product Specifications： 1.Working Voltage of the Receiver：110V-240V 2.Working Voltage of the PIR Sensor：4.5V（3 AAA batteries. not included) 3.Receiver Setting ： Music source: 38 different songs for optional Use the external button "music" to finish The function of volume adjustment: there are three kinds of volume (high, middle, low) for choice Adjust sound and 4.Working Range: Up to 100 meters. Infrared sensing distance: 3-7 meters. Product operation instructions: 1. Plug the receiver into the socket and turn on the detector battery cover to load the battery. 2. Insert the rotating bracket into the back of the detector. 3. The detector is pushed to the ON position and waits for the self-test time of 10 seconds to enter the normal working 4.Important: please keep the detector & receiver in sheltered places to avoid contact of both units form water and direct sunlight. 5.When the LED indicator does not go on , the battery power is either low or dead. At that time you should change the batteries. 6.Clean the detective regularly with a damp cloth to avoid blockage of sensor by dirt or any small particles. 7.Try to keep it in areas where it will not get wet. In addition, during heavy & snowfalls, it is recommended that unit should be indoor or in a safe place. 8.When the unit is not in use, take out all batteries; clean both units and store the units in dry , cool place. Package included: 1x PIR Sensor (Uses 3 AAA, not included) 1 x Receiver 2 x Mounting Accessories 2 x screws Teissuly Wireless Home Security Driveway Alarm, Entry Alert, Visitor Door Bell Chime with 1 Plug-in Receiver and 1 PIR Motion Sensor Detector Alert System, Quality Sound and LED, 38 Melodies Product Specifications： 2.Working Voltage of the PIR Sensor：4.5V（3 AAA batteries. not included) Music source: 38 different songs for optional Use the external button "music" to finish Adjust sound and