The AMPLIPOWER 50 Amplified Telephone, manufactured by Geemarc, is an extremely LOUD hearing aid compatible telephone for deaf and hard of hearing. The volume is user adjustable, during a phone conversation, and there is a boost button that takes the amplification to +60dB. The handset has an inductive coupler built in allowing people with hearing aids or cochlear implants that have a telecoil to use the T or loop setting during a telephone call. With the large buttons, ring indicator and speakerphone the AMPLIPOWER 50 is also ideal for people with poor vision and limited manual dexterity. If you require a phone with less amplification Geemarc have. as part of their Clearsound rang, the AMPLIPOWER 40 with adjustable volume and boost button to 40dB and the very popular CL100, with adjustable volume to 30dB.