<b>Specification: <br>Brand new CAL 223 REM Red LASER BORE SIGHTER <br>Power: < 5mW <br>Laser Wavelength: 650 nm <br>Sighting Range: 15 – 100 yards <br>Service Life: 10,000 hours <br>LED Type: visible Red Laser <br>Battery Use: Use 3 x LR41 button batteries each time. 3pcs batteries is one Set <br>Battery Life: Per set battery could last one hour <br><b>Package Includes: <br>Each Set well packed by plastic box and then plastic bag. <br>1 x Bore Sight <br>6 x LR41 button batteries (3pcs for EXTRA) <br>Note: The red Laser turns “ON” automatically when batteries installed, and will “OFF” only when batteries removed.