This Arrow Tech Dosimeter 3007A GM Survey Meter with 370 End Window Probe is in excellent condition. The Model 3007A is a portable, battery-powered Survey Meter that can be used for Radiation Monitoring and Contamination Measurements. The Model 3007A has a BNC Connector on the panel to attach to any one of a series of interchangeable probes. The Model 3007A has a BNC Connector on the panel to attach to any one of a series of interchangeable probes. The Model 3007A comes standard with a mR/h and CPM (Counts Per Minute) scale. The Model 3007A SV unit comes with a Sv/h and a CPS (Counts Per Second) scale. The 3007A is available with three different probes for a wide range of applications that include radiation level monitoring, contamination detection and frisking. The 3007A has individual calibration controls for each range and is equipped with a speaker which can be turned off. The speaker provides clicks that are in proportion to the radiation field intensity. You can view more information here: Arrow Tech Dosimeter 3007A GM Survey Meter with 370 End Window Probe