The geemarc amplified clamshell mobile telephone cl8400 is designed for those who are hard of hearing or deaf the geemarc amplified mobile telephone cl8400 is one of the loudest mobile phones available today and can reach a receiving volume of 40db four times as loud as a standard landline telephone this amplified mobile telephone still provides a clear sound even when set to the maximum volume level the geemarc amplified mobile telephone cl8400 offers a large colour lcd display exce