Gemlogis Astro Gem Tester. Gemlogis ASTRO is a two-way gem tester which works as a standalone device (via wired probe) or wirelessly with Gemlogis BELIZE PRO (sold separately). It features a touch-screen display panel that expand the simulant readings up to 29 types of gemstones, including diamond and moissanite. Powered by 3 AAA batteries (not included) or connect to USB. Measures: 153x107x30mm (6”x4.21”x1.18”). Weighs:217g (0.478lbs). Features: Shows up to 29 types of color gemstones. Tests stones, mounted or loose from 0.02ct in size. Large LCD touch screen. Works standalone or via wireless connection with Gemlogis Belize Pro (not included). Includes 1 each: Tester. Probe Tip. Universal Charger. Stone Rest.