Great whitening results but the led device is completely terrible. The button to turn on the mouthpiece is VERY sensitive and turns off the led if your lips get anywhere near it. It would be so much better if it was a mechanic button or placed somewhere other than right under where your lips sit after putting it in your mouth. Also there is no way to make sure you haven't accidentally turned it off or changed the setting unless you stare at it in a mirror for the whole treatment time. Would not recommend the wireless mouthpiece at all.
3 years ago
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