CRIMSON TRACE LG-902GMASTER SERIES COMPACT ROSEWOOD LASER GRIPS Product Type Master Series? Material Rosewood Attachment Grip Replacement Activation Location Front Activation Sighting Factory Sighted at 50' Master On/Off Switch Yes Battery Type Four #2016 Lithium Batteries Laser Battery Life Over Two Hours Wrench Size 0.028 User Adjustable Windage and Elevation Finish Natural Rosewood Grip with Rubber Overmold Activation Pad Installation User Installed Warranty Three Year Limited Warranty