AT A GLANCE 
 
British designed and engineered diamond tester for highly accurate readings
Main purpose is to detect for diamonds*
Includes a metal alert in case you miss the stone and touch the jewelry surface
Patented Illuminated display panel for easy to view detection results
Audible tone to help quickly identify the test result
Fitted with an integrated microchipped 0.6mm thermoelectric probe
Superior tough retractable tip allowing true contact with the surface of the stone 
Includes a patented 180-degree touch grip assisting to achieve accurate tests
Added feature of an LW395nm Ultra Violet light source for detection of florescence in diamonds. 
Automatic shut down function if you accidently leave it on
Our design allows easy use in either your left for right hand
Produced in house at our British-Chinese owned factory in Shenzhen
Designed and engineered with long standing international technical and design patents

Specification
Product Dimensions: 150 x 33 x 23mm (6.81 x 1.25 x 0.0.98in)
Product Weight: 80g (0.18lb) weight including battery
Battery Type: 1 x 9v battery
Battery Life: approximately 3 hours of continuous use based on high quality alkaline batteries, continuously using the UV light source will give you approximately 1.5 hours of use
Low Battery Warning: yes
LED Display: yes
Vocal Test Results: yes
Operating Temperature:
Operating temperature: 18°C - 28°C (64°F - 82°F)
Storage temperature: 35°C - 53°C (95°F - 127°F)

Package Content :
1x DK7900 Diamond Tester
1x Metal loose stone holder
1x User manual
1x PU leather carrying pouch
 
Warranty: 1 year from date of purchase.
 
WITH ALL TESTING EQUIPMENT IF YOU ARE UNSURE OF THE TEST RESULTS IT IS RECOMENDED TO MAKE SEVERAL TESTS FOLLOWING THE INSTRUCTIONS GIVEN WITH THE TESTER. IF YOU ARE STILL UNSURE OF THE RESULTS THEN YOU SHOULD CONSULT A PROFFESIONAL GEMMOLOIGIST. GEMTRUE ARE NOT RESPONSABLE FOR ANY DAMAGES OR LOSES THROUGH MISSUSE, INCORRECT TESTING PROCEDURES OR RESULTS.