Laser Sights are evolving though it will be interesting to see how much further they can take them. This year Viridian introduced their Reactor green laser sight with ECR technology. The "Enhanced Combat Readiness" feature provides an instant on function when you draw your pistol from the specified ECR pocket holster. Essentially, you can leave the power on at all times as long as the laser is stowed without worrying about draining the batteries. Then when you need the laser sight, your normal draw activates it leaving you with instant use and no additional step on your part to turn it on.
The Reactor will be available for Pocket pistols including LCP, LC9, and S&W Shield. Viridian is also offering the ECR technology in other models for larger pistols along with side holsters. View full details at ViridianGreenLaser.com