identify diamonds presidium gem tester

{"cid":"91125764","title":"Portable Gem Testing Instruments Diamond \/ Moissanites Presidium Gem Tester","imgUrl":"https:\/\/img.chinax.com\/nimg\/5a\/6f\/ced72a0e69891d8abc978389d087-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"Presidium","Model Number":"PMUT","Minimum Order Quantity":"1 pcs","Delivery Time":"7 working days after received your payment","Place of Origin":"Singapore","Payment Terms":"Paypal, T\/T or Western Union","Supply Ability":"500 pcs per month","Packaging Details":"One in a plastic bag then in a leather case then in a color box","Certification":"","Product Name":"Presidium Multi Tester","Size":"165X25X40MM","Battery":"3xAAA Batteries","Measurement Range":"0.02 carat and above","Weight":"97g","Warranty":"One year"}}