The ultimate tool for measuring electromagnetic fields (EMF) in various environments With a compact and portable design, the R9230 is equipped with multiple sensors to detect and measure different types of electromagnetic fields, including electric fields, magnetic fields, and radio frequency (RF) fields A color TFT display provides real-time readings, bar graph and trending graphs simultaneously, audible alarm, data hold and min/max functions Features an audible alarm, data hold and min/max functions, low battery indicator and auto shut-off, and triple axis (X, Y, Z) RF, EMF and ELF sensor Dimensions 4.2" x 2.4" x 1" (107 x 60 x 25 mm) Display 2.4" (60.96 mm) Includes (1) Multi-Field EMF Meter; (3) AAA Batteries Maximum Operating Altitude 6561' (2000 m) Operating Humidity Range