Video network burglar alarm system built for the security market burglar alarm network cohabitation, in order to enable customers to avoid misunderstanding, choose a real cheap alarm, suggest the following: 1. Is the manufacturer of the formal authorized dealers, general formal channels often We can offer better prices, quality service and quality products. 2, product packaging: whether the production contains the name and address, and contact mark? If the absence or whether it is to draw your attention to three free products or counterfeit products, due to normal factory produced product packaging must have above. 3, alarm host, infrared detectors, door whether through the national compulsory 3C certification, 3C certification of security products through the necessary certification, but also to ensure that the primary factor in the quality of products. 4, the control panel transformer is built, 3C designate the host country is necessary transformer internal, external is no possible through the national 3C test. 5, the alarm siren is built? External siren alarm security is relatively low. 6, the control panel and infrared detectors and anti-tamper whether the switching element? No such report the ability to protect themselves poor, easily vandalism. 7, infrared detector anti glare feature? See if this hardware, the device can prevent glare false positives. 8, infrared detector on its own temperature compensation? See if this hardware, the device can prevent false alarms caused by temperature changes. 9, infrared detector circuit board has a frequency stabilization element? This element can be prevented by a magnetic field pulse, the same frequency, high frequency, sound and other signals caused by false positives. 10, with or without low power prompts and related components? This feature prevents the voltage instability or low false positives arising. 11, with or without the use of micro-power design? Whether the power saving mode and scale models? This feature can be Director of the battery 12, an infrared detector is provided 9-12V DC input interface, a dual power supply, ensures that the detector does not work intermittently, reducing the hassle of replacing batteries. 13, infrared detectors used battery type? Ordinary AAA battery easily replaced, multiple choice type of large, massive battery is less convenient, and less power. www.baojingxitong.com 18719449656