The Krown StarPlus 45 is an amplified telephone designed for use by individuals who are hard of hearing. This phone amplifies the incoming voice by a 50 decibels (dB) gain and its advanced circuit design and its electronic anti-feedback filter work to make words clearer and easier to understand without feedback or distortion. Other features include a 95 dB loud tone ringer, caller ID capability, extra-large buttons with high-contrast graphics, back-lit liquid crystal display (LCD) and keypad, two-way speaker phone with separate adjustable volume, speaker phone indicator,100-number phonebook and 10 last dialed numbers, three emergency buttons, an extra-bright ringing indicator, an "extension in use" indicator, a "missed call" indicator, a voice mail indicator, adjustable ringer volume (High/Low/Off), ringer tone control, clock and timer, hold on music, and a voice message waiting On/Off switch. This phone can be wall mounted or usesd on a desktop. The handset is compatible with hearing aid T-coils. WARRANTY: One year from date of purchase against any defects in materials or workmanship.