DECT 6.0 accessory handsetInterference free for crystal clear conversations won't interfere with wireless networks and other electronic devicesProtect yourself from identity theft with digital security your call is digitized and encrypted, making it nearly impossible to eavesdropAccessory handset only requires DS6421 or DS6422 series phones to operate; no phone jack requiredCaller ID/ call waiting stores 50 callsHandset speakerphone enjoy hands-free conversationsIntecom between handsetsTransfer calls between handsetsConference an outside call between handsets50 Name and number phonebook directory easily store and dial frequently called numbersLarge white lighted display for easier viewingBlue backlit keypadHandset volume controlLast number redial Trilingual prompts choose between English, Spanish and FrenchPage/handset locator VTDS6401