Large Key Wired Telephone, Adjustable Ringing Tone, And Earpiece Volume, The Simple yet classic design, suitable for most use scenarios. The body shaped by ABS greatly improves the comfort of hand feel and appearance, as well as the durability and fall resistance. Button size: width: 1.0 inches, length: 0.7 inches. The oversized physical key is convenient for the elderly with limited vision to use, so as to ensure that they will not press the wrong number and make the wrong call The telephone is equipped with an adjustable ring tone and a large warning light at the bottom, so that you don't miss any calls you want to answer Adjustable ring tone and earpiece volume: the volume is specially increased to help the hearing impaired people answer, and can also be adjusted to the normal volume. Whether young people or hearing impaired people can adjust to the comfortable volume to ensure that it will not be too low or too loud Telephone line power supply: it can keep working even in case of power failure. You can communicate with your loved ones even in case of power failure. You don't have to worry about losing contact with your family after power failure