Philips MG7770/49, Self-sharpening blade, Oil-free maintenance, AC/Battery, Black, Stainless steel Philips MG7770/49. Product colour: Black, Stainless steel, Body grooming attachments: Beard trimmer, Ear trimmer, Foil shaver, Hair trimmer, Mustache trimmer, Nose hair trimmer,.... Power source: AC/Battery, Battery technology: Lithium-Ion (Li-Ion), Operating time: 360 min