Crimson Trace Master Series G10 Green Lasergrips for Springfield Armory EMP - LG-912G Activation Location: Front Activation, Attachment: Grip Replacement Battery Type: Four #2016 Lithium Batteries, Laser Battery Life: Over Two Hours Green Laser Sight for Springfield Armory EMP (Will NOT fit EMP Champion 4") Master Series Lasergrips are fully compatible with ambidextrous safeties This laser is in conformance with and complies with 21 CFR 1040.10 with a maximum power output of "5mW" for a "Class 3R Green Laser