NiteSite Eagle 550 Yards Identification Range Scope Mounted Night Vision System for Zero Light Hunting (Black, Full Kit) Suitable for use with any rifle; easy installation - 60 seconds max; no need to re-zero Operational run time up to 25 hours; 5.5Ah stock mounted battery Identification range - 500 metres (550 Yards) No ambient light required; 5 integral IR LEDs Water resistant; Operating Temperature: -20C to 60C (-4F to 140F)