Tips: Don't overfill the water, 2 3 of the tank is reasonable. Twist carefully to remove and close. Make sure you have it pointed into your mouth before you turn it on. Don't take the water flosser out of your mouth while it is working. Won't use for a long time, please keep the water tank dry. the flosser can't replace dentist, please consult your doctor if you feel unwell. WHAT'S IN THE BOX: 1 x SanPintech Water Flosser, 3 x Classic Jet Tip, 1 x Orthodontic Tip, 1 x Periodontal Tip, 1 x Tongue Cleaner, 1 x Waterproof Travel Bag, 1 x Charging Cable, 1 x Instructions. POWERFUL BATTERY: USB Rechargeable water jet dental flosser built-in 1100mhA battery, takes only 4 hours for fully charging and support 21 days use. There are a USB cable , a storage bag perfect for travel use, support power adapter, computer, car charger, power bank charging. IPX7 WATERFROOF EASY CLEANING: The 400ML large capacity detachable cleanable upgraded water tank for up to 150 seconds of continuous use. allows you to thoroughly clean the limescale inside, IPX7 waterproof design is adopted in both internal and external to provide dual protection, can use for shower in the bathroom and it's washable to clean. 360 GRAVITY BALL DESIGN: 360 rotating jet tips combined high pressure water pulse 1400-1800 times min, remove 99.99 food residue hidden deep within dental cracks and the gum effectively, traditional brushing can not reach, while massaging your gums and promoting blood circulation. DEEP CLEANING TEETH IMPROVE GUM HEALTH: Powerful Oral Irrigator with 1400-1800 times minute high pulse, 400ml water tank and 360 degree rotating tips, efficiently removes 99.99 plaque and debris deep between teeth and below the gumline. Great for people with implants, braces, crowns, bridges, and gingivitis. 5 CLEANING MODES DESIGNED FOR SENSITIVE TEETH: SanPintech water flosser comes with 5 different pressure settings (Low, Midium, High, Pulse, Lowest) , you can choose the water pressure level according to your needs. Suitable for sensitive teeth , also helpful for bleeding gums, bad breath, benefitical for brace and bridge care.