Cordless Handset for Ooma Service, 2" Color Display, Supports HD Voice, DECT 6.0 Support, Picture Caller ID, Intercom, One-Touch Voicemail Access, Call Log, Online Phonebook. Make cordless voice calls over the Ooma Vo - Equipped with a 2 color display the cordless HD3 Handset supports wideband HD Voice technology which is designed to deliver double the audio quality of typical narrowband calls. The handset also supports the DECT 6.0 cordless telephony standard which helps to ensure optimal range security and sound quality. - The HD3 Handset's picture caller ID feature displays a picture of the caller along with their caller ID information. The online phonebook lets you sync your Yahoo Google Facebook and Linked - In contacts. An intercom lets you talk with other handset users in your home while one-touch voicemail makes it easy to check your messages. Other features include call waiting and a call log. - The HD3 handset requires Ooma service and an Ooma Telo device.