Top features: - Brush discreetly with a quiet-operating toothbrush - Clean your teeth faster with ultrasonic vibration technology - Easy to clean by washing under water Brush discreetly A low operating noise of just 51 dB means you can discreetly brush anywhere without making too much noise. Ultrasonic technology High speed vibrations use sonic technology to effectively and quickly brush your teeth, making the Panasonic EW-DS90K503 perfect for a quick clean on your travels. Easy to clean This Travel Toothbrush is easily cleaned under running water - just gently run the brush under a tap ready for the next use.