adjustable aid assist assistance blow blowing disability disabled fingering fingers handgrip handicap handpiece instrument legs man metal mobile mobility-aid music musical musician saxophone saxophonist support wheelchair wind-instrument aluminium bodyweight bodyweight-support Canadian-crutches crutch crutches cuff forearm-crutches Lofstrand-crutch weight-transfer alpha-numeric-keypad black blank buttons communications communications-device curved edges edging gadget handphone home-phone input-device lettering mobile-device mobile-phone numbers numerals numeric-keypad office-equipment portable press push-buttons screen smooth symbols telephone telephony white