Easy to use even for a new beginner</br> Emit audible sounds to give accurate reading</br> Diamond indicator will be showed if the stone is a REAL diamond (Green light)</br> Metal alert (continuous buzzing sound when user accidentally touches metal rather than stone )</br> Large / small switch for testing diamonds +/ - 8 points</br> To emit sounds to give accurate reading</br> LCD display & LED indicator</br> If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction</br> Dimension: 16.5 x 4.2 x 2.2cm</br> Powered by DC 9V battery x 1 (<b>not included</b> )</br></p> <br/><b>Package content :</b> <br/>1 x Diamond selector II tester <br/>1 x Testing Platform <br/>1 x English user manual <br/>1 x Protected leather Pouch case