The colour of the plug end indicates the ear - Blue for left and Red for right. Signia S 1L miniReceiver 3.0, Standard Power, Length 1 and Left Ear (blue) for Signia AX Platform RIC Hearing Aids. Signia S 1L miniReceiver 3.0, S = Standard Power, 1 = Length 1 and L = Left ear side (blue) for Signia AX series RIC Hearing Aids.
