Good Material - It is made of solid High quality ABS housing, high sensitivity alloy probe, rubber protective cap, well heat-conducting plate. Fast & Precise Measurement - A quick, accurate, safe way to distinguish diamond from the simulants, brings no harm to the diamond. Easy Use - Turn on, wait for heating up ready, hold(finger on heat-conducting plate), use the probe to make 90-degree contact with the measured object. Intuitive Design - Sound beep and LED lights straightforwardly indicates test result(beep & light: diamond, continuous buzzing sound: metal, no signs: simulants). Portable Size & Leather Bag - compact, diamond tester, powered by 1 x 9V 006p battery, for easy store, carry. Note: Due to different production batches, the color of the product shell have a little color difference. Diamond tester set only, other accessories in the pictures are not included. Color:As shown Material:plastic Package Contents: 1 * Portable Diamond Tester Pen(The color of accessories is random, and the designation is not accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.