DLP Tactical Precision Laser Sight for Colt 1911 Government and Clones Compact Laser Sight Attaches To Trigger Guard, No Frame Rails Needed Powerful 5mW 650nm Red Laser Diode, Class III A/Class 3R Installs with no modifcation to your pistol needed Ambidextrous Micro-Switch On/Off Activation Powered by 1 CR2032 battery (not included)