This document is a user manual for a smartwatch from a certain brand and model. The brand is XXXX and the model is XXXX. The watch can measure blood oxygen, heart rate, and sleep data.
The Wonder TW21880GE-B is a digital wireless telephone designed for home or office use. It features an LCD display, multiple sub‑phone extensions, and various call handling functions.
The manual covers important safety precautions, battery handling, power requirements, installation steps, button functions, language and time settings, and warranty information. It also explains how to connect up to four sub‑phones and how to use features such as call preview, three‑way calling, and call transfer. This manual is written in Chinese.
| Power Supply | AC 110‑120 V |
|---|---|
| Battery Type | NiMH 1.2 V 600 mA rechargeable |
| Maximum Sub‑Phones | 4 |
| Display | LCD |
Use a 1.2 V 600 mA NiMH rechargeable battery, do not mix with other battery types, avoid high temperatures, and replace only with the same specification.
Immediately disconnect the power supply to prevent electric shock or fire hazards.
Up to four sub‑phones can be added to a single main unit.
The device requires an AC power source of 110‑120 V.