Accessory handset expands your Vtech DECT 6.0 LS6425, LS6426, LS6475 or LS6476 phone systems. Handset cannot be used independently. DECT 6.0 Digital technology provides the best sound quality, security and range in cordless phones. Handset delivers interference-free, crystal-clear conversations and won't interfere with wireless networks and other electronic devices. The frequency band has been extended allowing the signal to be reproduced and tuned for a fuller and clearer sound. Digital security protects you from identity theft by digitizing and encrypting your calls to prevent eavesdropping. Handset includes Caller ID, speakerphone, push-to-talk intercom, HD audio, blue backlit keypad and display, handset volume control, last number redial, page/handset locator, selectable ring tones and a stylish metallic finish. 50 name/number phonebook directory lets you easily store and dial frequently called numbers. Language prompts include English, Spanish and French.