Hamilton CapTel 840i Real-Time Closed Captioned Telephone Designed specifically for individuals with difficulty hearing over the phone. REQUIRES Telephone Service and High Speed Internet Connection (Ethernet or WiFi). Captioned Telephone is easy to use. It works the same way you'd use any other telephone. If you can't hear what someone says over the phone, simply read the captions. Captioned Telephone works with a no charge captioning service where specially trained operators use advanced voice recognition technology to generate captions of everything the other person says. There are no monthly fees or service agreements and your monthly phone bill won't change Installing the captioned telephone is easy and installation support is available. Captions are available in English or Spanish. Internet Protocol Captioned Telephone Service (IP CTS) is regulated and funded by the Federal Communications Commission (FCC) and is designed exclusively for individuals with hearing loss.