HOW IS THIS VISIONAID DIFFERENT FROM OTHERS? MORE LEDS MEANS SUPERIOR VISIBILITY OF MAGNIFIED OBJECTS 3 AAA Batteries are Required to Power the LED Light. The Batteries are NOT INCLUDED.Battery powered version OUTLASTS the USB rechargeable version because you can change the batteries as many times as you wish. Whereas the USB rechargeable version has limited amount of recharge cycles after which the built-in battery dies and the led light stops working.3 Brightness Modes: Cold, Warm, Combined (Cold+Warm). ENHANCED VISIBILITY = REDUCED EYESTRAIN CRYSTAL CLEAR VIEW OF SMALL DETAILS GREAT FOR HOBBIES AND CRAFTS READ SMALL TEXT IN A DARK ROOM WITHOUT EYESTRAIN.
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