Black Cat Guard is one of the earliest enterprises engaged in the production and sales of security products, a member of the China Security Association, with independent intellectual property rights and dozens of core technologies. HM-110GM1 supports mobile phone alarm and network alarm, up to 4 different emergency alarm calls can be entered, and the defense zone setting supports functions such as at home, out, timing, and partitioning. The infrared detector of the black cat supports both battery and external power supply, and the detection range is large, which can achieve a 110° cone angle and a range of 8-12 meters. However, HM-110GM1 is not good enough in terms of product integration, the host is a separate control chassis, daily household is a bit cumbersome, and the interactive design of the keyboard is also a little outdated. HM-110M3M is relatively smaller、Beautiful,The price is about 600 yuan,The front-end detector is also very affordable,The unit price is only 33 yuan,But the sensitivity of the black cat guard's products is average,The use experience needs to be improved。