The Sigma Metalytics Precious Metal Verifier Pro 3 Wands SM2701 is a reliable and high-quality tool for verifying the purity of precious metals. Made in the United States, this unit comes with a manufacturer warranty of 2 years, ensuring its durability and performance. With its advanced technology and brand reputation, this PMV Pro model is a valuable asset for anyone looking to accurately test and verify the quality of their precious metal investments.