Tests all colors of gold in 10K, 14K, 18K, 22K, 24K and platinum. Follow easy steps to identify non-gold, gold plate and gold filled as NOT GOLD. Automatically generates detailed e-mail receipts for both your business and customer. One touch easy calibration for consistent results. May be calibrated using 10K, 14K, 18K, 22K, 24K or platinum. Apple: Requires Low Energy Blue Tooth. Android: Requires Lollipop version OS. Requires Low Energy Bluetooth. One year warranty.