Philips BEARDTRIMMER Series 7000 BT7205/15, Washable, Oil-free maintenance, AC/Battery, Black Philips BEARDTRIMMER Series 7000 BT7205/15. Minimum hair length: 0.0197" (0.5 mm), Maximum hair length: 0.394" (1 cm), Step precise: 0.0197" (0.5 mm). Product color: Black, Blade material: Stainless steel. Power source: AC/Battery, Operating time: 60 min, Battery type: Built-in battery