The Sonic Black Whitening removes dental discolouration and plaque. The surface of the teeth is polished very thoroughly by black active charcoal particles, which are released from the brush head with up to 45,000 vibrations per minute. Thanks to its memory function, the toothbrush “remembers” the last selected setting. The hand piece consists of soft, slip-proof material and has an luscious jet-black finish. It features a lithium-ion battery and a USB port.