Model DD-4 Digital DurometerAvailable Types: A, D, B, C, DO, E, M, O, OO, OOO, ASKER CFeatures: Conforms to ASTM D-2240Custom Made Carrying CaseSolid state circuitry with LCD displayFeatures: Conforms to ASTM D-2240One Year WarrantyCustom Made Carrying CaseHigh and low buttons for setting tolerance limitsSolid state circuitry with LCD displayResponse speed is immediateHolds reading until reset0.1 resolutionDial rotates up to 270°Extra-Large Number DisplayCapable of USB and RS232 Communication with Rex Approved Cables200 Measurement Readings can be stored inside the indicator and viewed on the LCDStored Measurement Readings can be Downloaded to a Computer Using the Rex Gauge USB Data Output Cable Select type of hardness testerShore Hardness TesterType of Hardness Test Shore A Output Yes Accuracy Conforms to ASTM D-2240 Resolution 0.1 resolution Range HA:10-90