Available in 9MM, 380 Auto, 40 S&W, 45 ACP.The Pink Rhino Laser Training Cartridge provides instant laser activation when the trigger is pulled. Train with your pistol using any visible laser target system or simulation.Select the appropriate caliber for your pistol. Requires three LR626 batteries (included).Bright red Class 3A (<5mW) laser cartridge 630 - 670nmNote: To prevent damage to the o-rings, a very thin coat of oil should be applied to each o-ring. Reapply as needed.Not compatible with Girsan Regard, Ruger SR series or Hi Point pistols. Using this product with Hi Point pistols will result in damage to the sensor.