HHA Rechargeable Sight Light and Charging Cord Rechargeable sight light compatible with most Optimizer Lite and Tetra series sights;Three adjustable brightness settings for optimal visibility;Enclosed mounting bracket to direct light onto fiber optic wrap;Rheostat for precise brightness control;Compatible with all HHA sights except the 3000 series;Rechargeable battery included;Charging cord included for convenience;Designed to enhance visibility in various light conditions