Oticon BiCROS Transmitter-Hearing Aid Combo. Oticon storage case. Instructions for use (miniRITE T Oticon CROS). Instructions for use part 1 (Oticon Play PX miniBTE T). Instructions for use part 2 (Oticon Play PX miniBTE T/R). 2 heading aid cleaning wires (red). PX1 version. The hearing aid unit goes in the right ear and the transmitter unit goes in the left ear.