New Crimson Trace LG 415 Red Laser Grips FOR RUGER LCR & LCRX One Size:Black By implementing their patented ConneXion Medium:Navy White Red By implementing their patented ConneXion technology that ensures zero negative vibration in the hands the Wonderlite features a 100% HyperLite Composite Design ensuring a fully optimized sweet spot for maximum performance but is fully user adjustable for Windage and Elevation with provided tool FITS: Ruger LCR and LCRx Revolvers RUNTIME: 4 hours of battery life that runs on (2) 2032 batteries (included) EASE OF USE: Front activation button engages the laser immediately when the firearm is held in a normal firing grip this model features a master ON OFF switch for completely powering down the unit user installed no gunsmithing required RELIABLE: Factory sighted at 50 feet