- Water Source: Clear Water, Tap Water
- Group Size: 1,2-5
- Usage: Often
- Effective Against: Bacteria, Protozoa, Cysts, Virus
- Output: 0.5 liter/48 sec, 1 liter/90 sec
- Length: 7.3mm
- Width: 1.7mm
- Height: 1.7mm
- Weight: 178g
- Batteries Required: Yes
- Batteries Included: No
- Battery Type: 4 AA
The Steripen Classic 3 with 40-micron pre-filter is the latest, more versatile model in Katadyn's award winning Classic line. Winner of Time Magazine's Best Invention of 2001, it offers enhanced ergonomics and battery life as well as improved water resistance. An 8000 treatment lamp delivers a lifetime of purification. The 40x40 micron screen Pre-Filter fits perfectly on wide-mouth one liter water bottles and removes particulates that can get in the way of UV light in water. The Pre-Filter is designed to be stored directly on a wide mouth bottle and the Steripen Classic 3 fits perfectly in the filter. Just insert the Steripen Classic 3 in the filter opening, turn the bottle upside down, and gently rock to circulate light throughout bottle.