VIRIDIANREACTOR R5 GEN 2 GREEN LASER SIGHTING SYSTEM - GLOCK 19/23/26/27•ECR® Instant-On™ feature shuts laser off while holstered & instantly activates laser the moment you draw•Windage/elevation adjustment •High strength thermo molded polymer construction •Includes an Instant-On ambidextrous inside the waistband (IWB) custom fit holster •NOTES: Green Laser* - 510-532nm wavelength range 100 yds. (day) 2 mi. (night) - Battery Life: 3 hr. constant 5 hr. strobe