?Contact Us?Seago is committed to providing quality products and services to our customers. Seago will replace a new one for free if there is quality problem within one year. If you need any technical support, please don't to hesitate to contact us.Login your account > choose "Your orders" > find the order ID > click "Contact seller". ?Fast Charge 4 Hours Last 30 Days?The toothbrush has a built-in high-capacity battery and uses fast-charging technology that rechargeable sonic toothbrushes can last 30 days (2 times per day) on a full charge, perfect for on-the-go travel. IPX7 waterproof can be used in the bath or shower. ?5 Brushing Modes?Electric toothbrushes for adults with 5 personalized cleaning modes (white, clean, sensitive, polish, and massage) for all oral care needs. Choose the sensitive mode of the sonic toothbrush to protect your sensitive gums, the clean mode for your daily dental care, the white mode for weekly use, the polish mode for brighter teeth, and the massage mode to strengthen your teeth. ?10 Toothbrush Heads for Over 30 Monthes?Sonic toothbrush comes with 10 replaceable different brush heads, that use last full 30 months. Box included: 1 brush handle, 10x brush heads(4x daily use head, 3x powerful plaque control head, 2x tongue cleaning head, 1x interdental cleaning head), 1x toothbrush holder, 1x USB charger cable, 1x user manual. ?Updated Sonic Technology? Sonic technology is designed according to oral and dental characteristics, clinically proven superior 3D cleaning action oscillates (up to 40000 vibrations/min), pulsates to break up and remove all antibacterial, antifungal, and antiviral build-up on your gums and teeth. Sonic electric toothbrush effectively removes plaque and improves gum health within 7 days.