Note 1. 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 healthier Specifications Water Proof:IPX7 Dual Waterproof Water Tank:220ml Open Water Tank Work Mode:Normal, Soft,Pulse Pulse Frequency:1200-1600 times/min Water Pressure:30-130PSI Battery:2000mAh Lithium Battery Deep Clean by TINTON LIFE Dental Oral Irrigator 30-130psi for virous people If you are new user of water flosser, please choose soft mode until you get used to the water flosser 3 Cleansing Modes Strong: Standard Water Pressure for Experienced Userd Weak: Gentle Water Pressure for New User and Sensitve Teeth Pulse: For Deeper Penetration, massaging gums and rinsing between teeth and gums Easy to Use 1.Fill water 2.Inset the tip 3.Press the Power Button to Turn on(off) 4.Short Press the Mode Button to Select suitable Clean Modes 3 pieces Classic Tips For 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 Tip Great 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's orthodontic tip makes it easier to get to those hard-to-reach areas. Big Water Tank water pick with 220 ml open water tank design which make you easy fill water and clean after use. Gravity Ball Design Built-in innovative gravity ball, flosser can be used normally at any angle.