Rechargeable Battery : No need to worry about replacing batteries, simply recharge the device for convenience. 3 Modes Water Tank : Choose from 3 different modes to customize your flossing experience and achieve optimal oral health. 300ML Waterproof Teeth Cleaner : The waterproof design ensures that the device can be used in the shower or bath without any worries. PULSE Water Jet Principle : The pulse water jet principle provides a powerful and effective cleaning experience for your teeth and gums. Fairywill Water Flosser 5020E Feature: Deeply Clean Teeth, Whiten Teeth and Improve Gum Health It's easy design, ideal for travelPortable. 3 Flossing Model to Suit All Different Conditions of Teeth and Gums 300ML Detachable Water Tank & 7 PCS 360 Rotatable Water Jet Tip Powerful Battery Life with USB Cable Charged for Travel & IPX7 Waterproof I'll have a good idea. Specifications: 1.Power: 5W 2.Charging Time: Approx. 4 hours 3.Battery Life: 1 Charge = 30 days of use 4. Ravero capacity: 300 ml / 10.0 floz 5.Pressure Range: 30-100psi 6.Built-in Battery Capacity: 1400mAh