Specifications include, but are not limited to: RADIOLOGICAL SPECIFICATIONS: Gamma Source: 3.3 MBq (90 uCi) +/- 40% Source Type: Sealed Source – Special Form Source Housing: Stainless Steel, Encapsulated Shielding: Lead Maximum Surface Dose Rate: 0.2 mrem/hr at 5 cm Shipping Case: Excepted Package PRECISION for 1-minute test on 125 pcf block at 6-inch deep probe depth: 0.25 pcf – based on one standard deviation in density readings. ELECTRICAL SPECIFICATIONS: Main Power Source: 5 C NiMH (Rechargeable Pack) batteries Backup Power Source: 5 AA alkaline batteries Charge Source: 12 V DC, 2 A Battery Recharge Time: 3 hours maximum, with automatic cutoff Battery Type: type that allows incremental charging without full charging Automatic Shutdown after 5 hours of complete inactivity MECHANICAL SPECIFICATIONS: Gauge size: 23.75” Height x 16.5” Length x 13.88” Width Shipping Case size: 31.3” Height x 20.4” Length x 15.5” Width Gauge Weight: 30.5 pounds Shipping Weight: 83.0 pounds Operating Temperature: 41 to 1,228 degrees Fahrenheit Storage Temperature: -67 to 185 degrees Fahrenheit Operating Humidity: up to 98% relative humidity, non-condensing USB Port: accepts devices up to 0.4” by 0.79”