FULLY AUTOMATIC – Say NO to bottled water, hand pumps and gravity filters – simply press the ON/OFF button, then take a rest or handle other things like setting up tents and cooking. No more strenuous effort or lying down to collect water. It passes the SGS Water Quality Test, FDA standard test, FCC, UL Certification and offers a healthy drinking water guarantee, even in remote areas. FAST FLOW RATE AND LONG ENDURANCE – Super fast purified water flow rate of 700ml (23oz) per minute. Built-in 2800mAh rechargeable battery, support for continuous use for 180 minutes, and a one-time charge purifies 168L (5,681oz) of water, enough for 10-15 days. It can be charged via power bank, solar panel, car power, etc. HIGH EFFICIENCY 5-STAGE FILTERING SYSTEM – Ultra Pre-filter + KDF filter+ high quality activated carbon filter + Level PP cotton + internal ultra-filter. Both the pre-filter and internal filter need to be replaced every 6 months from your first use (or every 1000L of filtered water), but if you keep it clean it can last longer. Locate a B0BQ64V4SG pre-filter, and a B0BQBM7JFR internal-filter, or find them in our store. PORTABLE SURVIVAL AND EMERGENCY LIGHT – Only 12.4 oz in weight (350g), perfect for personal or small group outdoor, hiking, backpacking, camping, hunting, fishing, survival, and emergency preparedness purposes. Emergency lights also make it easy to get water, even in the dark. WARRANTY - Greeshow water filter contains 2 years warranty and lifetime customer service. Just write to us and we will offer the best solution to resolve any purifier defects or problems. Customer service available within 24 hours on workdays.