The document contains information about the features and characteristics of the products.
This manual explains the features of the Kolin KTP-509WL Caller ID system, including the base unit (母机) and up to four extension units (子机). It covers functions such as incoming call number display, night‑light keys, LCD contrast adjustment, and anti‑theft call blocking.
Installation steps describe connecting the base unit to power (DC 9V/300 mA adapter) and telephone line, charging the extension batteries (3.6 V/280 mAh), and pairing the devices. The guide also provides settings for time, date, contrast, and call‑display options, plus service centre contact information. This manual is written in Chinese.