A dual-keyboard UbiDuo Communication Device is designed to allow deaf or hard-of-hearing users to communicate with anyone face-to-face in real time. Several models are available: the UbiDuo 3 allows users to type messages back and forth with others (in both wireless and wired versions), while the UbiDuo 3 Text to Speech 1 and the UbiDuo 3 Text to Speech 2 convert typed text into audible speech. Wireless models use a proprietary technology to connect the two halves to each other without requiring internet, Wi-Fi, or cellular data. The devices reportedly have an 8-hour battery life and weigh approximately 31/2 pounds.