This is a pulse signal to audio signal converter specially designed for old dial-type telephones. Through this converter, your old telephone can convert the pulse signal into a dual tone multi-frequency (DTMF) signal. The number dialed by your telephone can be recognized by modern switches and successfully dialed. In this way, your favorite phone is not just a decoration; the old telephone set from decades ago can be used again. It is especially suitable for cities or areas that no longer support the pulse dialing signal of old-fashioned dial telephones, including users of internet or fiber to the home services. The enhanced version can be used on standard local telephone lines, fiber optic or network adapter lines, as well as personal switch lines. Numbers can be dialed and it facilitates automated voice communications. It includes a "redial" function. Easy to install and use, with no need to dismantle or modify the phone. Simply connect the two wires of the telephone to the designated terminals, plug in the crystal plug of the telephone line, and it is ready for use. Power Management: Not supported Type: Switch/Distributor Remote Wake-Up: Not supported Note: Different batches may have differences in product appearance, color, and printed characters, which do not affect functionality. Color: As shown Material: Plastic Package Contents: 1 x Converter Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement may vary by +/- 1-3 cm.