The all-new Amtech ErgoZM Magnifier has the established ErgoAm design with advanced feature to adjust working distances on each side within a range of 400 to 600mm while maintaining a wider field of view, which guarantees comfort while working. Amtech headlights provide bright and focused illumination from your line of sight to provide shadow free vision. We have 3 models of headlights to choose from. HLP03 and HLP05 are wired headlights and WHLP01 is a wireless headlight. Prescription is for carrier lens and inside the loupe for working distance correction.