As part of Panasonic’s commitment to reduce its environmental impact this product comes with digital operating instructions via a QR code to encourage customers to re-use their existing one. Panasonic phones are digital landline ready. After your landline service moves to digital voice (VOIP), the old telephone sockets in your home will no longer work. Please connect the telephone cord to the internet router according to your internet provider's instructions. For those who have moderate hearing loss: Hear clearly with Volume Boost Control for amplifying handset receiver volume up to +40 dB, Hearing Aid Compatibility Support; Loud base unit ringer by up to 100 dB Slow Talk Mode: Understand words more clearly by slowing the speed of speech in real time by up to 20%; Tone Control (5-level and 20-type custom setting) with detailed treble emphasis Never miss incoming calls: Bright red Ringer LED on Base unit and Handset notify incoming calls visually; Talking Caller ID announces caller's name in your phonebook between rings Large, 1.8-inch white backlit handset display plus illuminated keypad with big buttons ensures easy viewing and operating; Enlarged Memory dial buttons on base unit enhances calling convenience Various Features: Answering Machine, Speakerphone, Talking Keypad and Phonebook, 250-number Nuisance Call Block, Intercom, and expandable to 6 handsets with optional amplified handset KX-TGMA45