Easy installation For the motion sensor, use adhesive tape or 2 screws in the package to fix it to the entrances of the porch, store, office, factory, garage or from any other location. For the wireless receiver, simply place it on your desk or near from your home. Attention, please: 1) Test the alarm kit before installing them. 2 ) To avoid false alarms, install the sensor in a location protected from direct sunlight, rain or strong wind. 3) If it is used as a voicemail reminder, the wireless signal transmission distance will be reduced If the voicemail is made of metal. 4) After mounting the sensor, please adjust its angles to get a wide and correct detection range. Additional accessories are available According to your actual demand, you can order additional motion sensors, detectors door if you have multiple areas to monitor or protect. AP02 and AP03 infrared motion sensors are available. AP04 Door Window Sensor is available. The remote AR03 order is available. Just search