G5 Optix Universal Rheostat Light Kit -
Blue LED light, sealed in a machined-aluminum housing. Offers 8 distinct brightness levels with positive, audible position adjustment, for the perfect level of light in any situation. Uses three size 373 watch batteries (included) and includes four bases to fit Optix, Apex, Truglo, Trophy Ridge, Extreme, or PSE sights. Color: Black with Blue LED.
Manufacturer model #: 221.