This FK308 is designed to create a port in the telephone circuit to insert music or advertising messages when the caller is put on hold. The circuit requires no additional power. However, its
efficiency ensures practically no load on the line. FK308 is an economical easily- built accessory for home, shop or office.

Technical information:
 - No need the power supply, the power comes from telephone line and
 - PCB dimensions : 1.88 x 1.63 inches.

Download User Manual

NOTE: No Telephone cable, we sale only the board