Bticino 2W NEW Classe 100 Audio Handsfree Internal Unit (100A16E). It Has 2 Physical Keys For The Control Of The Main Functions And Has 3 Touch Keys For The Control Of The Main Functions. There Are Further 4 Configurable Touch Keys That Perform DifferenBticino 2W NEW Classe 100 Audio Handsfree Internal Unit (100A16E). It Has 2 Physical Keys For The Control Of The Main Functions And Has 3 Touch Keys For The Control Of The Main Functions. There Are Further 4 Configurable Touch Keys That Perform Different Functions. The Installation Can Be Made To The Wall Using The Bracket Supplied Or Using Optional Table Support Accessory 344692.