aquasonic duo dual handle ultra whitening 40,000 vpm wireless charging electric toothbrushes - 3 modes with smart timers - 10 dupont brush heads & 2 travel cases included aquasonic complete oral care for 2 – aquasonic duo provides complete oral care in one simple countertop setup. duo features 2 modern smart toothbrushes with the latest oral care technologies including ultrasonic 40,000 vibration per minute motors, true wireless charging, 4 unique modes including modes for whitening teeth and gum health, 30 day battery life, in sleek midnight black and optic white brush handles. duo comes with 12 additional accessories including 10 dupont brush heads and 2 travel cases.