Braun BT7020, Washable, AC/Battery, Self-sharpening blade, Black, Gray Braun BT7020. Minimum hair length: 0.0197" (0.5 mm), Maximum hair length: 0.787" (2 cm), Step precise: 0.0197" (0.5 mm). Product color: Black, Gray, Blade material: Stainless steel, Country of origin: China. Power source: AC/Battery, Operating time: 100 min, Battery type: Built-in battery. Weight: 13.6 oz (385 g), Cord length: 47.2" (1.2 m), Battery weight: 0.656 oz (18.6 g). Package width: 2.24" (57 mm), Package depth: 6.1" (155 mm), Package height: 9.92" (252 mm)