Mi Beard trimmer is engineered for the modern man with an ultra powerful battery and superior features for a perfect trim. Self sharpening stainless steel blades with skin friendly. rounded tips. 40 length settings with 0.5 mm precision (2 combs);ipx7 fully washable body for easy cleaning. Versatile corded and cordless usage options. Ultra powerful battery – up to 90 minutes of cordless usage with just 2 hour charge time.