PARALOW HS515C is new small compact a red dot sight with the option of dot only or dot with circle reticle pattern. Employing new LED technology the life time for one CR2032 battery life is about 20000 hrs at Circle Dot reticle and about 50000 hrs at dot reticle. Attached non obstructing flip-up lens covers and kill flash. The sight may be installed on various firearms such as shotguns pistols rifles air rifles and crossbows. - Features: - Parallax free with unlimited eye relief. - Minimize vision obstruction with push button controls and streamlined housing design. - Solar and battery power supplies. - Switch between circle dot and red dot reticles. - Kill flash included. - Battery tray. - Flip-up lens covers won't obstruct your vision. - 1/3 Co-witness QR mount included - Quick release mount. Adaptable to Picatinny. - CNC machining with T6061-T6 aluminum housing.