Protect valuable office property from loss and theft with this easy-to-use, state-of-the-art marking system. Includes a permanent ultraviolet marker to invisibly label your valuables, plus a powerful, compact UV light to reveal the markings. Use for identification, to recover lost or stolen items, or to authenticate documents. Batteries included. Counterfeit Bill Detector Type: UV Light Pen; Marking Color: N/A; Counterfeit Indication Mark: N/A; Currency: N/A.