The practicality of intelligent security products ultimately has to be tested through actual use. Recently, a journalist conducted a one-week field test on the JYM39WIFI smart peephole camera, experiencing it from various perspectives such as daily use and handling of special situations. The test revealed that this product is ingeniously designed in its details, truly achieving the qualities of being “easy to use, durable, and practical.” In everyday scenarios, the JYM39WIFI’s sensitivity in detecting visitors is outstanding. During the test, when the tester moved within 1-5 meters of the door, the device responded quickly and sent an alert message within no more than 3 seconds; when the person stopped moving or left, the device automatically returned to standby mode, effectively preventing false alarms. The high-definition image quality of 3 million pixels allows for clear capture of visitors’ facial features during the day, and when the night vision function is activated at night, it can accurately distinguish people’s outlines and movements without any noise or trailing effects on the image. The ease of installation exceeded expectations. The tester used a standard household security door (with a thickness of 70mm and a peephole diameter of 25mm), and the entire process took only 8 minutes, without the need for drilling or welding, using the included installation tools. The product can also be perfectly adapted to older doors with a thickness of 110mm and peepholes with a diameter of 50mm with the provided adapters, showing strong compatibility. In terms of battery life, the JYM39WIFI maintained 65% of its battery capacity after 5 days of continuous use, with an average of 10 detection recordings per day, each lasting 10 seconds. With this level of usage, a single charge can last for about 15 days, eliminating the need for frequent recharging. When the battery level is low, the mobile app sends a warning, reminding users to charge the device in time to avoid a security gap due to a power outage. “With the traditional peephole, I was always worried about my child being alone at home and encountering strangers. Now with the JYM39WIFI, I can monitor the situation outside at any time, and it even alerts me when someone comes by. The voice-changing function is particularly useful; it really makes me feel much more at ease,” said Ms. Li, a single woman who participated in the test. The product is currently available for sale on major e-commerce platforms and in physical security stores, and special discount packages are offered for both home and business users, further enhancing its cost-effectiveness.