At present, there are several reasons for false alarms and false negatives in burglar alarm accessories. The anti-interference ability of the wireless detector is characterized by the same frequency interference, which is easy to cause false positives and false negatives. The infrared detector's judgment on the intrusion is not accurate enough to cause false positives and false negatives. Infrared detectors are susceptible to false alarms due to environmental factors such as temperature and light. The wireless detector power supply system lacks power, and when the power is low, the information transmission is not effectively performed, so that the detection distance of the detector becomes short or does not work, and false negatives are generated. Since both the host and the detector are set by wireless coding, there are repetitions of the code and the re-report caused by the re-code of the host and the detector. As a more than 10 years experience in manufacturering low volts landscape lights factory, our staffs are trained to know every steps amoung get order to shipping, you can relax after place order. We can know your requests fast, revise accodig to your spec requirests right away, for important product revise, there will be R&D person talk to you directly. For fast knowing lasted price and after-sale service, please email us, contact us or call us right away! outdoor lighting, landscape lighting, landscape lighting design Landscape Lights Pro , https://www.landscapelightspro.com