A 'real' signal mirror is a mirror with a built-in way to precisely aim it's reflection (from the sun), and is intended to alert others of your location.
Best Glide ASE Compact Emergency Survival Signal Mirror
Signal Mirror, StarFlash, 2 x 3
BESPORTBLE Emergency Mirror Signal Mirror Outdoor
ESEE RAT Signal Mirror
Best Glide Ase Compact, Military Grade, Stainless Steel, Emergency Signal Mirror (2 Pack)
ESEE Signal Mirror - Survival Supplies Australia
Worthwhile 1 Piece Outdoor Reflective Signal Mirror Portable
Heliograph Signal Mirror With Whistle Multifunctional Outdoor
Lead Multi Function Signal Mirror Outdoor EDC
Best Glide ASE Signal Mirror Holders
ESEE Signal Mirror - Survival Supplies Australia
ESEE RAT Signal Mirror
Made of strong, shatter-proof acrylic material our Featherweight Mirror provides an exceptionally clear image with no distortion and features a conveniently integrated lanyard hole. Size: 2.75” x 4.25” (7 cm x 11 cm). Weight: 0.7 oz. (20 g).
Coghlan's Featherweight Mirror
24HSD GEARWARD