StyleCraft Instinct Metal Trimmer with IN2 Vector Motor SC410MStyleCraft Instinct Metal Trimmer Professional IN2 Vector Motor with Intuitive Torque Control SC410M Rear Metal Housing dampens noise and absorbs vibration for quieter, and smoother operation IN2 Vector Motor with Intuitive Torque Control offers an unmatched 9,500 strokes per minute Assembled with a Fixed Black Diamond X Pro Wide blade and The One deep cutter Lithium ion Battery delivers up to 4 hours of cordless run time with a 2 hour recharge time