20V is the brushless motor voltage; 110V–240V or 50/60Hz is the lithium-ion battery charge voltage. Three sockets (17, 19, and 21 mm) and a 50W integrated work light LED battery power indicator are included. Securing Capabilities: - M10-M20 is the standard bolt; - M10-M16 is the high tensile bolt; - No load speed (RPM) is the high tensile bolt (5mm–14mm). - Modes of Impact: Hard: 0-2400/Min - Soft: 0-1600/Min Minutely Impacts: 0-3700/Min for Hard Impact Mode and 0-2500/Min for Soft Impact Mode