See the stage at the theatre or opera, and light your program with this precision-crafted opera glass. A nonintrusive beam of red light is provided by simply pressing the center knob, enhancing its versitility and appeal. The finely ground, richly coated glass optics are encased in an exquisite red marbled body with gold trim. Complete with two mercury batteries and sophisticated black leatherette case. Gift boxed, the Firefly makes a great gift for anyone who enjoys theatre or opera. Beyond style, this 3x, 23 optical instrument with individual focus eyepieces, is a high quality performance binocular manufactured by Swift instruments.