... RECOGNIZED IR DETECTOR LICENSED FROM USASMALL SIZE,LIGHTWEIGHT,AND INEXPENSIVELARGE FIELD OF VIEW,NO PARALLAX,NOT BLOCK ... NORMAL VIEWHANDS FREE,VISION FREE,WALKING FREEWATER,FIRE,AND VIBRATION RESISTANCE50-INCH EQUIVALENT VIRTUAL-REALITY LARGE SCREENREAL ... BATTERY OPERATING FOR 2.5 HOURSPATENTED DESIGN,SAFE OPERATION AND USER FRIENDLY SPECIFICATIONS Detector UFPA Resolution 120×160,but ...