Now you can appraise gold and platinum quickly and safely - anywhere in the world. The Electronic Gold and Platinum Tester gives you unmatched accuracy on all colors of gold, from 6K to 24K, as well as platinum. This compact tester operates on an included 9V battery, so you can take it anywhere. Simply touch the pen probe to the gold, and an LED indicates the karat. There are no messy gels, chemicals or dangerous acids to spill. Take it with you to estate sales, swap meets and flea markets to buy gold and platinum with confidence.