Ooma HD2 Handset Two-Inch Color Screen and Picture Caller-ID Cutting-Edge HD Voice Clarity Superior Security and Range; Please refer the Quick Installation Guide before use DECT 6.0 support: Get superb sound quality, security and range for the Ooma HD2 Handset and the Ooma Linx remote phone jack without interfering with your Wi-Fi network or other home electronics Check messages from anywhere in your house.With Ooma Premier, make any Ooma device a private extension with a password-protected voicemail account