Universal Car GPS HUD Head Up Display Holder,Toullfly&reg; for iPhone Samsung Smart Phone Navigation as Car GPS holder Navigation Mount Image Reflector (Black) Vehicle cell phone accessory works with any smartphone and hud apps Turns any smartphone into a head-up display (hud) for any car Reflects any hud-based app of your cell phone and displays it right in driver's line of sight The reflected image is discernible in any visibility (day and night Its clearly to see the navigation with the reflection,which is also power saving and convenient.