The Siemens Signia Ace Primax uses a size 10 battery and therefore is the smallest RIC in the Primax family. It comes in 3 levels of technologies and are great for first time hearing aid users who want a discreet device that pack a punch. The Ace Primax comes in a variety of colours and does not have bluetooth and does not connect with wireless accessories. The Ace 7px comes with 48 channels and includes programs to help with tinnitus. The Primax platform is great for people who enjoy listening to music due to the HD music programs.