The handset is sleek with an ergonomic design and easy-to-read display. The KX-TGA660M features text-to-speech technology, you can hear caller ID information while the phone rings. The Panasonic KX-TGA660M also features Silent Mode, so you can turn off the handset ringer whenever you desire. Bedside Handset In Silent Mode Remains Silent While Handsets In Other Locations Will Ring For Incoming Calls, 1.8" Backlit LCD Display, Backlit Keypad, 50 Station Name / Number Caller ID Memory, 50 Station Phone Directory / Dialer, 3-Way Conferencing, 4-Step Handset / Headset Volume Control, 6-Step/Off Ringer Volume Control Handset/Base, Visual Ringer, Ringer ID Customize Ringer ID for Incoming Calls, Handset to Handset Intercom, Handset Locator, Chain Dial, 5 Number Redial, Hold, Mute, Flash, Clock & Alarm, Any Key Answer, Up To 13 Hours Talk Time, Up To 11 Days Standby, 60 Channel Operation, Low Battery / Out of Range Indicator, Headset Jack, Belt Clip - Included w/ Brand New Models, Will Not Work Without Base: KX-TG7644M, KX-TG7642M, KX-TG7645M, KX-TG7643M