Philips BEARDTRIMMER Series 7000 BT7085/33, Self-sharpening blade, Black, Silver Philips BEARDTRIMMER Series 7000 BT7085/33. 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, Silver. Operating time: 75 min, Battery type: Built-in battery, Battery technology: Lithium-Ion (Li-Ion)