KX-TGA950B Extra Add-Ons handsets for KX-TG9541B, KX-TG9542B, KX-TG9581B, KX-TG9582B. Features: New DECT 6.0 Plus Technology Interference less Communication Increased Clarity / Enhanced Security Wider Range / Network Friendly 1.9GHz Extra Handset / Charger Dedicated for Cordless Phones by the FCC 30% Battery Life Increase Over 5.8GHz 2-Line Operation Caller ID Remote Access Message Playback Individual Erase Control the Greeting MessageAutomatic Noise Reduction Handset Speakerphone 3-LineLCD Display Backlit Keypad Built In DirectoryHolds up to 600 Names and NumbersCall Block 3-Way ConferencingVolume Control Call Transfer Auto Channel Search Before & During Call Hold Up to 12 Hours Talk TimeUp To 5 Days StandbyHeadset Jack Call Waiting Note - Will Not Work Without Base: KX-TG9541B, KX-TG9542B, KX-TG9581B, KX-TG9582B. Base Sold Separately.