The document contains features and characteristics of the products, but specific information is not provided.
The Wonder WD-739 is a telephone call‑display device equipped with an LCD screen, multiple function keys, and support for up to 38 call groups. It is designed for easy installation and user‑friendly operation, offering features such as automatic call identification, anti‑tamper protection, and adjustable contrast.
This manual covers safety precautions, physical layout, installation steps, initial configuration (time, date, IP settings), detailed phone function operation, basic maintenance, and power usage guidelines. It also includes troubleshooting tips and warranty information. This manual is written in Chinese.