One LED bulb, but the pattern is with two color, one is white pattern, another is yellow pattern. Move the button in the front to shift the pattern color. When its under the yellow pattern, we have special glass chip to filter the blue light so that the composite material wont get hard very soon. Its very beneficial for dentists to do some operations with the composite material.
The sensor is on the right side, its very convenient for clients to operate.
Totally covered design will make the reflector has much longer life time.
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