Steripen Ultra(TM) UV water purifier is our flagship model with our most advanced user interface featuring a user-friendly OLED display (Organic Light Emitting Diode). Effect: Eliminates bacteria, protozoa and viruses Treatment size: A 1/2 or 1 liter Treatment time: 48 or 90 seconds Lamp Life: 8&';000 activations Battery: Internal USB Rechargeable Lithium-Ion Dimensions: 7.3x1.6x1.3in Use only on clear water, as cloudy, sediment-laden water hinders effectiveness. Includes a neoprene carrying case and USB cable. Kit includes Neoprene pouch, USB cable SPECIFICATIONS Technology uv Weight (oz) 5 Battery type USB rechargeable Number of liters per charge 50 Lamp life 8000 activations Volume options 1 click = 0.5 liter, 2 clicks = 1 liter