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Ideal for close-up precision work, leaving your hand free. This fully adjustable headband includes 4 interchangeable optical lenses and built-in spotlight. For professional, craft, hobby or DIY projects demanding close-up work. Features: • Fully adjustable tough plastic headband • 4 precision ground interchangeable lenses covering all focal lengths from semi close-up to very close-up • Easily changed over by simple slots on the headband • Plastic protection case for lenses • Battery operated adjustable spotlight & switch • 2 x AAA 1.5v batteries for spotlight Magnification | Working Distance mm / inches | 1.2x | 500 – 600mm (20 – 24”) | 1.8x | 225 – 300mm (9 -12”) | 2.5x | 125 – 250mm (5 – 10”) | 3.5x | 75 – 125mm (3 – 5”) | |