User manual for the Haoyi TC-278/378 handheld UHF/VHF walkie‑talkie, covering safety, installation, operation and maintenance.
This manual provides safety information, a list of supplied accessories, and step‑by‑step instructions for installing the antenna, battery and external accessories of the TC‑278/378 handheld walkie‑talkie.
It also explains how to operate the device, adjust volume, use call functions, manage power settings, and perform routine maintenance and warranty procedures. This manual is written in Chinese.