bt-ishieldDesigned to disappear and weighing almost nothing, bt ishield adds a seamless layer of protection to every service. The bt ishield accessory for the bt vision 2. 0 retains the fit, feel, and functionality of the bt vision 2. 0 and gains a new level of protection and assurance for the safety of your team and clients. Use of the LED white light and magnification lenses are unchanged. Can be worn as glasses or with the headband option based on personal