1[Keep Your Gum Healthy] Your mouth is the important way to your overall health, so keeping your gum healthy is essential. 2[Massage Gum] Using an optimal combination of pressure and pulsation, removes plaque and food particles from brackets and wires. 3[3 Modes Oral Irrigator] The oral irrigator has 3 modes, and upgrades with pressure settings ranging from 40psi to 140psi. 4[Water Tank Type] Removable large capacity 140ml / 4.7oz water tank. Perfect for using at office, gym, home or travel. 5[15 Working] With 600mAh lithium battery, last 15 (working twice a ) or continuous working 60min after fully charged in 3 hours. Item Type: Dental Oral Irrigator Shell Material: ABS Water Tank Material: PC Input: DC 5V/1A Output: 3.7V/5W Frequency: 50 / 60HZ Water Tank Type: Removable large capacity 140ml / 4.7oz water tank Water Pressure Range: 40-140psi Built in Battery: 600mAh lithium battery (included) Charging Method: Convenient portable USB charging Charging Time: 3 hours Fully Charged Working Time: 15 (working twice a ) or continuous working 60 minutes 1 xOral Irrigator 1 xReplaceable Nozzle 1 x USBCharging Cable 1 x Manual