Requirements: 1. Maintain the original format and structure. 2. The translation should be accurate, fluent, and natural. 3. Maintain professionalism and consistency. 4. Only return the translation result; do not add any explanations. Original text: As the number of people living alone increases and the security needs of shops evolve, the shortcomings of traditional peep holes—such as limited visibility, lack of warning, and difficulty in tracking—become more apparent. The YM39WIFI smart peep hole introduces several innovative features, such as dual storage (local and cloud) and voice-changing communication options for both men and women, redefining the smart security experience and becoming a popular product in the security market recently. Data security is one of the key concerns for users. The YM39WIFI smart peep hole offers a dual storage solution, with local storage supporting up to 128GB of TF cards (FAT32 format) for daily video recording; it also supports additional cloud storage services, ensuring that video data is safely preserved in the cloud even if the device is damaged or stolen, thus preventing the loss of evidence. This design addresses the critical issue of data loss associated with traditional security devices, providing users with double protection. The product’s voice-changing communication feature has received positive reviews; for example, when a single woman or elderly person encounters an unfamiliar visitor, they can use the mobile app to switch their voice to a male voice to effectively avoid potential security risks. Additionally, the product supports multiple users simultaneously, allowing family members to add their accounts or shop owners to authorize employees to monitor together, implementing a “one person sets up the security, multiple people protect” management model. Communication stability is essential for remote monitoring. The YM39WIFI uses WIFI 802.11 b/g/n communication mode to ensure a stable and smooth connection between the mobile device and the peep hole, whether for real-time video viewing, remote communication, or video retrieval, without any lag or buffering. In terms of power consumption, the product achieves an efficient balance; even when the infrared light and screen are both active (at their highest power levels), the power consumption is only 380mA, balancing performance and energy efficiency. An analyst in the home security industry commented, “The core advantage of the YM39WIFI smart peep hole lies in its ability to accurately identify users’ needs and integrate three key requirements: advanced warning systems, data security, and convenient interaction. It meets the daily security needs of family users and is also suitable for small businesses, offering broad market potential.”