Oral Irrigator 3 Modes USB Rechargeable Water Flosser Portable Dental Water Jet 220ML Water Tank Waterproof Teeth Cleaner|Oral Irrigators1. You had better close most of your mouth to avoid the water spray off.2. Please choose the soft mode when you use it at the first time.3. If your teeth are sensitive, please use warm water, it will be more comfortable.4. You need to charge the water flosser for 4 hours before first time use.5. Change new nozzles every 3 month is healthierSpecificationsWater Proof:IPX7 Dual WaterproofWater Tank:220ml Open Water TankWork Mode:Normal, Soft,PulsePulse Frequency:1200-1600 times/minWater Pressure:30-130PSIBattery:1200mAh Lithium BatteryDeep Clean by TINTON LIFE Dental Oral Irrigator30-130psi for virous peopleIf you are new user of water flosser, please choose soft mode until you get used to the water flosser3 Cleansing ModesWEAK: Standard Water Pressure for Experienced UserdStrong: Gentle Water Pressure for New User and Sensitve TeethPulse: For Deeper Penetration, massaging gums and rinsing between teeth and gumsEasy to Use1.Fill water2.Inset the tip3.Long Press 3s the Power Button to Turn onoff4.Short Press the Power Button to Select suitable Clean Modes3 pieces Classic TipsFor Daily clean, ultra-fine pulsed water flow, not only uses the force of water to floss the teeth, but it massages gums and feels great while getting all the food particles out of your teeth.1 piece Orthodontic TipGreat for people with braces and orthodontic appliances. It can be very difficult for people with braces to use dental floss around the wires of their braces. The irrigator& 39;s orthodontic tip makes it easier to get to those hard-to-reach areas.