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 peepholes—such as a narrow field of view, lack of warning, and difficulty in tracking—become more apparent. The YM39WIFI smart peephole introduces several innovative features, such as dual storage (local and cloud) and voice-changing intercom functionality for both males and females, redefining the smart security experience and becoming a popular product in the security market recently. Data security is one of the core concerns for users. The YM39WIFI smart peephole 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 in case 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 dual protection. The product’s voice-changing intercom feature has received positive reviews; when a single female or elderly person encounters an unfamiliar visitor, they can use the mobile app to switch their voice to a male voice to communicate with the visitor, effectively mitigating 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 modes to ensure a stable and smooth connection between the mobile phone and the device, preventing lag or buffering when viewing videos in real-time, conducting remote conversations, or accessing recorded footage. In terms of power consumption, the product achieves an efficient balance, with power usage only reaching 380mA even when the infrared light and screen are both active, balancing performance and energy efficiency. An analyst in the home security industry stated, “The core advantage of the YM39WIFI smart peephole lies in its precise identification of user needs, integrating ‘early warning, data security, and convenient interaction’ to meet the daily security requirements of family users as well as the operational needs of small shops, offering a very broad market application prospect.”