Class IIIA, less than 5mW 632-650nm red dot laser. The 7.62x39 laser bore sight is fit for 7.62x39 Wylde chambers, caliber specific. 3 sets (6 total) batteries. Each set lasts up to an hour. Putting the batteries in the bore sighter and automatically turn on. Please remove the batteries after use. Easy to use, bore sight kit make the red dot sight to zero much faster. Saved your time and ammo. Machined from reliable and durable brass casing. Sturdy, high accuracy and bright. Easy to sit perfectly in the bore. [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/1_cb6520bb-c98b-4ac4-b30c-be8e141b01c9_1024x1024.jpg?v=1637031748] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/2_79f66983-7512-4375-8063-c7349d945905_1024x1024.jpg?v=1637031791] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/3_6908a05a-55bc-43c1-88c7-9cf018a02a40_1024x1024.jpg?v=1637031807] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/4_6d50db4e-5c96-4a0e-811d-9bd598c1b4b9_1024x1024.jpg?v=1637031821] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/5_115746de-3ede-43d5-8f18-007ba80c124b_1024x1024.jpg?v=1637031835] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/6_4e324e83-c922-450b-ba8b-b27135aec770_1024x1024.jpg?v=1637031856] [https://cdn.shopifycdn.net/s/files/1/0599/5508/5505/files/7_6e915eca-afb3-4d00-8601-bb11920b2509_1024x1024.png?v=1637031873] Feyachi 7.62x39mm Laser Bore Sight The 7.62x39 laser boresighter provides the most convenient and accurate method for sighting in 7.62x39 rifle. No more trips to the range to sight in your equipment you can sight in anywhere with this laser bore sight. It designed for firearms chambered in 7.62x39 mm. This device is placed in the chamber, and projects a visible beam on to a wall or other flat surface. Adjust and zero-in your optics or iron sights without ever firing a round. It makes the process much faster, easier, and ensures you don’t waste precious ammunition during these times. Sighting range of the bore sight is 15 to 100 yards. Machined from solid brass. The bore sighter very made and are easy to use. There is no on/off switch,the laser is actuated by tightening the end-cap, and will stay on until loosened again. Specification: Construction: Brass Length: 38.6mm; Tail width: 11.29mm; Head width: 8.5mm Laser Wave length (nm:) 632 to 650 Power: <5 mW Sighting Range: 15 - 100 yards Dot Size: 2" at 100 yards Temperature: -10℃ to 40℃ Package included: 1 X Bore Sight 6 X LR41 Battery