function: a: top shower &handle shower (plastic w/chrome planting) b: hot&cool water control valve(brass w/chrome plating) c: towel rack&washing stuff holder.(plastic w/chrome plating) d: shampoo box(transparent plastic w/part silver plating) e: ceiling light(12v safe voltage) f: ventilation fan(12v safe voltage) g: radio speaker(12v safe voltage) h: acupuncture massage head. i: foldable foot massage device (plastic) j: steam generator w/remote contorler k: electronica control panel(12v safe voltage) 1: lcd screen 2: light control 3: fan control 4: fm radio runner 5: telephone receiver 6: steam control.