Compatible with: Amplivox Amplivox 240, Amplivox Amplivox 260, Amplivox Amplivox 270, GSI GSI39, GSI TympStar Pro, GSI GSI18, GSI Pello, GSI GSI 61, GSI AudioStar Pro, GSI Audera, GSI Audera Pro, Interacoustics TITAN Firmware & Software (IMP440), Interacoustics Titan hardware improvements (probe/SB), Interacoustics AT235/AT235h Blackline, Interacoustics AA222 blackline, Interacoustics AT235/AT235h New, Interacoustics AA222 new, Interacoustics AA222 with insert headphones, Interacoustics Affinity 2.0, Interacoustics Equinox 2.0, Interacoustics Callisto, Interacoustics Affinity Compact, Natus-Otometrics Aurical, MedRx Avant ARC, MedRx A2D+/REM+ Combo

3C large Jumbo 0.70