Lightweight frame and headlamp designs support better ergonomics, resulting in less strain on your neck and an overall more comfortable working experience. Exceptional quality, class and value. Innovative modular frame system. Proprietary locking mechanism designed to simplify the adjustment of flip-up style loupes. Portable LED light source. Available options: Perivista Custom Loupe TTL 2.35X CUS-235-ADI Perivista Custom Loupe TTL 2.7X CUS-270-ADI Perivista Custom Loupe TTL 3.1X CUS-310-ADI Perivista Custom Loupe TTL 4.0X CUS-400-ADI Legacy Flip-Up Loupe Mirage Frame 250 LEG-250-MIR Legacy Flip-Up Loupe Mirage Frame 300 LEG-300-MIR Legacy Flip-Up Loupe Mirage Frame 350 LEG-350-MIR