A teeth whiting device including a main housing having a main housing opening disposed about an axis offset from a vertical axis. The teeth whitening device further includes an extension arm having a first arm end portion and an opposed second arm end. The extension arm is coupled to the main housing adjacent the first arm end portion and extends through the main housing opening. A light emitting unit is coupled to the second arm end portion and is adapted to emit light within a prescribed wavelength range toward teeth of a user for whitening the teeth. The extension arm is flexible and capable of assuming a prescribed configuration to enable selective positioning of the light emitting unit relative to the main housing.
