Philips BEARDTRIMMER Series 7000 BT7085/15, AC/Battery, Black Philips BEARDTRIMMER Series 7000 BT7085/15. Minimum hair length: 0.0394" (1 mm), Maximum hair length: 0.709" (1.8 cm), Cutter width: 1.26" (3.2 cm). Product color: Black. Power source: AC/Battery, Operating time: 75 min, Battery technology: Lithium-Ion (Li-Ion)