Feature: 1. LCD AND LED DESIGN: Portable jewelry tester, with LCD display and LED indicator, to quickly identify the detected objects, has high sensitivity and high accuracy. 2. HIGH EFFICIENCY: Mainly used to quickly identify diamonds and other jewelry, the measurement results are accurate, and easy to read, efficient and convenient. 3. SOUND ALARM: If a real diamond is detected, the green LED will light up, and if it is a moissanite or simulated diamond, the red LED will light up and give an alarm. 4. COMPACT SIZE: With compact design, this jewelry detector pen is easy to carry and store, and comes with a stone holder for easy detecting operations. 5. WIDE APPLICATION: This jewelry testing pen kit is perfect for jewelry stores, auction venues and laboratories, etc., which has a wide range of applications. Specification: Item Type: Moissanite Pen Material: ABS Power Supply: 1 x 9V 6F22 dry battery (not included). Package List: 1 x Moissanite Pen1 x Storage Bag1 x Holder1 x User Manual Note: 1. The tested items should be kept clean, dry and at room temperature, otherwise it will cause false detection.2. The probe is very sensitive and should be protected with a cover when not in use.3. Low power should be replaced in time.4. If the battery is not used for a long time, please remove it.