Our sonic toothbrushes are designed to provide all of the following outstanding benefits to aid in achieving optimal dental care: Stain Removal: 30-times better than a manual toothbrush Approximately 36,000 sonic vibrations per minute Low Noise Operation Ultra-Durable, Premium Dupont® Nylon Bristles 5 Cleaning Modes & 3 Intensity Settings to customize your brushing experience: Clean, Sensitive, Gum Care, White & Polish Patented lock/unlock feature to lock in your favorite brushing mode and intensity A truly premium quality electric toothbrush created by brand led by an award-winning scientist with years of experience in the dental care industry, the SprinJene Natural Sonic Electric Toothbrush is expertly engineered to provide superior brushing: 5.5mm amplitude and swing arm with 80% bristle end rounding rate to effectively reach all tooth surfaces Quadpacer technology with a 30-second interval prompt indicates when to move to another quadrant of your mouth Smart 2-minute timer, eliminates any guesswork to ensure you reach the dentist-recommended 2-minute brush time 90 days of brushing on a single battery charge with 2000MAH rechargeable Li-ion battery Each toothbrush comes with 2 brushing heads, head cap, travel case, and charging pad Experience the difference in your brushing routine today... with the SprinJene Natural Sonic Electric Toothbrush: Sonic vibrations: approx. 36,0000 vibrations per minute Bristles: Dupont Nylon (Brush head lasts up to 60 days, includes 2 replacement heads to get started) Battery: 2000MAH rechargeable Li-ion battery Low power indicator: When the battery is below 3.5V, the motor will vibrate three times to remind the user to charge the toothbrush. The toothbrush will stop working when lower than 3.0V. 1st Light (less than 30% battery) 2nd Light (less than 33%-67% battery) 3rd Light (less than 67%-100% battery) Fully charged: Three lights on at the same time for 30 seconds indicates the toothbrush is fully charged. Full charging may take 12-16 hours. Quadpacer Technology: Every 30 seconds, the quadpacer interval reminds you to brush each section of your mouth. (To make sure you brush evenly throughout your mouth, divide your mouth into 4 sections using the quadpacer feature) Carrying Case and Transparent Cap Charging Pad USB can connect to any 5V UL listed computer, USB hub, or USB duplex receptacle 5 CLEANING MODES & INTENSITY SETTINGS Clean Mode: The default mode and ultimate in plaque removal. Clean mode lasts for 2 minutes and includes four 30 second quadpacer intervals. Sensitive Mode: Extra gentle 2-minute mode for sensitive teeth and gums. This is recommended mode for beginners and children. Gum Care Mode: Long amplitude vibration for gum massage. White Mode: Sonic vibration with alternate amplitudes to remove plaques and stains and whiten teeth. Polish Mode: 2-minute strong vibration for teeth whitening and polish PATENTED LOCK/UNLOCK TECHNOLOGY To Lock: Press the button twice and hold for 3 seconds, and the 5 modes lights will flash at the same time. This indicates that the current mode and frequency have been locked. To Unlock: Press the button twice and hold for 3 seconds and the 5 modes lights will flash twice at the same time. This indicates that the current mode and frequency have been unlocked. AUTOMATIC SHUT-OFF The SprinJene Sonic Electric Toothbrush will shut off automatically after 2 minutes of use for clean, sensitive, gum care, and polish modes and 2 ½ minutes for white mode. HOW TO USE THE SPRINJENE NATURAL SONIC ELECTRIC TOOTHBRUSH ON: Press the power button to turn on the brush. Press again in less than 5 seconds to toggle through brushing modes. OFF: Hold the power button for 2 seconds to turn off the brush. Turn off the brush before taking it out of your mouth to prevent splashing water and toothpaste. Rinse your brush head and handle with water after each use. Wipe the entire surface of the handle with a soft tissue or cloth.