New Jet Diamond Tester. This is a new Jet diamond tester. It has less than a 6 second warm up time with less than a 2 second recovery time. It runs on 110V, 60Hz. Positive identification of simulants and metal and improved sensitivity on small stones and white sapphire. It has automatic shutoff. The tester includes an AC/DC adaptor. It measures approximately 6 5/8" x 3/4" (168 x 19 mm). The storage case measures approximately 7 7/8" x 5 7/8" x 1 7/8" (200 x 149 x 47 mm).