Main Features:  Highly Efficient Brushless Motor:  With more torque and power, and extremely low running noise than brushed.  Max 220Nm Torque, 3600BPM Impact Frequency:  Drive screws or tighten nuts into the metal at astonishing speed.  4 Gears Speed Adjustable:  Designed for a wide range of fastening applications.  Gear 1: 0-1000RPM Wood.  Gear 2: 0-2000RPM Thick Metal.  Gear 3: 0-3000RPM Thin Metal.  Gear 4: 0-3400RPM Self-stop.  Variable Speed Trigger:  The deeper you press, the faster the motor spins the driver shaft.  1/4' All Metal Chuck:  Change bits by simply pulling back on the collet.  LED Work Light:  Illuminate the poorly-lit work area and eliminate shadows.  2.0Ah Li-ion Battery:  Faster charging time and power up for a longer run time.  Soft Rubber Handle: Ergonomic Compact Design.     Specification:  Name: Brushless Impact Driver.  Voltage: 20V.  Maximum Torque: 220N.m.  Plug: 110V US Plug / 220V EU Plug.  No Load Speed: Gear 1: 0-1000RPM.  Gear 2: 0-2000RPM.  Gear 3: 0-3000RPM.  Gear 4: 0-3400RPM.  MImpact Frequency: Gear 1: 0-1100BPM.  Gear 2: 0-2100BPM.  Gear 3: 0-2900BPM.  Gear 4: 0-3600BPM.     Package Contents:  1x Brushless Impact Driver.  1x Plug(US/EU Plug Optional).  1x Battery Pack.  2x Sleeves.  2x Screwdriver Bits