1Sturdy Materials: Our large button phones use premium ABS materials, heavy duty desktop phones, sturdy and long service life. 2No Battery Required: This large button phone is powered by the phone line. We do not need to install batteries; it is both energysaving and environmentally friendly. 3Easy to Install: This phone only needs to be inserted into the coil wire and telephone line; plug and play, easy to use. 4Prestored Number: This big button phone can pre store home number, SOS number and meal order number. It is easy for the elderly to make calls. 5Humanized Design: You can replace 9 pictures of your family and friends on the keyboard. It helps the elderly to quickly find the numbers. 6SOS One Touch Speed Dial: Red button design, SOS button is easy to find to make emergency calls. Item Type:Landline Model: LD-858HF Material: ABS Color: White Function: 1. FSK/DTMF dual system, support audio/pulse. 2. Mute, redial and hands free speaker functions. 3. Ringer volume off/high/low switch 4. Earpiece volume high/low switch 5.9 speed dial buttons Scope of Application: used at home, suitable for the elderly with impaired vision and hearing 1 x Telephone Landline 1 x Telephone Receiver 1 x Handset Cord 1 x Telephone Line 1 x Standard Telephone Line 1 x Manual