1. Provide convenient, safe and clean outdoor drinking water. 2. Super Water Purification Ability: Under normal circumstances, at least 1000 liters of water can be filtered. 3. Remove at least 99.9999% of aquatic 4. Remove at least 99.9% of aquatic parasitic protozoa. 5. Reduce the Turbidity: Can filter out about 0.2 microns of particles. 6. No chemicals. Specification: Material: ABS + PE Filter Material: Ultrafiltration Membrane, Activated Carbon, Nano Silver Particles Size: 21.5cm x 3.3cm/8.46" x 1.30" Color: Green Package include: 1Pcs Water Purifier 1Pcs whistle 1Pcs compass 1Pcs Mirror 1Pcs Carabiner 1Pcs Straw Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3mm measuring deviation due to manual measurement.