Variable speed (12,000 - 18,000/min) and 1.7° left/right oscillation movement allows quick completion of professional applications into materials such as metal, wood and plastic. With FIXTEC™ tool free blade change and a bright LED work light. A fuel gauge also displays the remaining charge. REDLITHIUM-ION™ battery pack delivers up to 2x more run time, up to 20% more power, up to 2x more battery life and operates better down to -20°C than other lithium-ion technologies Flexible battery system works with all Milwaukee® M1B™ batteries