CLEANING: To clean or Fill the tank faster, grab the Tank and twist the handle/pump to the left and pull up gently. After cleaning or filling with water insert the handle/pump onto the Tank and twist returning to its original position. RECOMMENDATIONS: A very convenient way to use this item is at the shower while taking a bath or at least is the best way to start using it until the person get used to it. Materials are IPX7 waterproof hence there is not risk of damage by getting wet during a shower. Clean the tank with regularity at least a couple of times a week and it is advisable to keep it or store it away from humid places when not in use for long periods. This item has 4 operative MODES: Low: This mode is advisable for beginners to get familiarized with the item or for persons that has sensitive gums and low tolerance Mid: Deliver a good water pressure for better cleaning results and to keep healthy gums High: Adequate flow pressure to remove food residues, removes and avoid dental plaque formation. On this mode the item can sustain a continuous water flow for more than 80 seconds when fully charged. Pulse: Deliver intermittent high-pressure water flows suitable for gum massaging and deep cleaning at the same time. It is the favorite mode of many users. COMFORT: The ergonomic design and light weight of this portable unit contributes to experience an easy way to operate the irrigator and the nozzles can rotate 360° making possible to reach all parts of the oral cavity. BATTERY: Rechargeable battery can take 6-8 hrs to a full charge that can last for more than 30 days with a moderate daily usage. The box also includes an USB type cable, 4 nozzles and a bag which is convenient when traveling which can accommodate all the items inside. CAPACITY: This dental floss device is fitted with an upgraded translucid 350ml water tank, that could be twice of the capacity of other previous models, avoiding the need for frequent refills and making your oral cleaning more convenient and efficient without adding much weight to the item. Tank can be filled with water in two different ways, one, without removing the tank from the handle thru a water intake port/cavity or by the principal mouth located at the top of the tank. PERFORMANCE: This water flosser for teeth delivers high water pressure pulses at 1300-1600 times per minute / 60-110 PSI effective to remove and prevent dental plaque formation and for deep teeth cleaning. This water dental pick also massages the gums, promotes blood circulation, and addresses oral issues that causes bad breath. Also is very convenient to clean difficult areas for persons with dental braces/brackets.