It is fitted with a retractable tip so as to ensure an accurate and effectual level of detail. The beeping alarms which are built into the system help determine diamonds as a metal detector or measure. Being in around the weight off two pounds it is portable and has very low battery consumption. One of the latest and innovative diamond testing equipments available on the market today to verify the absolute authenticity and legitimacy of a gemstone are these manual testers It has a built in and fully integrated metal detector that sets off an alarm in contact with any alien metal. With its latest state of the art surfaced tip technology, it provides accurate and effectual readings during every testing session.