Laserlyte Zombie Side Mount Laser Kel-Tec/Ruger 9mm Battery Life: 5 hrs constant on, 10 hrs pulse mode (normal usage*) Compatible Firearms: Ruger LC9, Kel-Tec PF9 Power Output: Class IIIA, 5mw Laser Module: 650nm Range at Night: 500 yards/457.2 m