Check the listing for details. Eberline RO-2A Radiation Survey Meter. Condition: Used. Listed at 400.00 USD. Eberline RO-2A Ion Chamber is an industry standard Ion Chamber meter preferred by most Technicians. 4 Ranges-0-50mR/h, 0-500 mR/h, 0-5R/h & 0-50R/h Retractable Beta Shield. • Ion Chamber • 4 Ranges • Retractable Beta Shield • Total Counting Range from • 0 – 5000 mR/hr • Built in audio The device does power "ON", they need to be recalibrated by a professional. The item pictured is one of several, so you may not receive an item with the same serial number. If you have any questions please reach out.