The Laser Ammo SureStrike Dry Fire Training System 9mm Laser Cartridge uses a microprocessor in the primer that activates a laser when struck by the weapon's firing pin. Simulating the firing cycle with high-quality electronic training aides such as the SureStrike Dry Fire Training System 9mm Laser Cartridge reduces the cost of training to almost nothing! Practice anywhere or anytime! Includes:3 Reflective targetsBattery pack