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 vintage telephone set from decades ago can be used functionally in today's environment. It is especially suitable for cities or areas that no longer support the pulse dialing signal of traditional rotary phones, including users with internet or fiber-to-the-home connections. The enhanced version works on standard local telephone lines, fiber optic or network adapter lines, and private switch lines. It supports number dialing and facilitates automated voice communications. Features include a redial function. Easy to install and use—no need to dismantle or modify the phone. Simply connect the two wires of the telephone to the designated terminals and plug the crystal plug of the telephone line into the wall jack to begin using. Power Management: Not supported Type: Switch/Distributor Remote Wake-Up: Not supported Note: Product appearance, color, and printed characters may vary slightly between batches, but these differences 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 differences in display settings may cause slight variations in the color of the item as seen in the picture compared to the actual product. Measurement may vary by +/- 1-3 cm.