The EMF450 is a convenient 3-in-1 EMF meter that measures and displays magnetic field, voltage field and radio frequency strength simultaneously. Ergonomic pocket-sized design with easy-to-navigate menu. Large TFT color display shows digital readings, bar graphs and trend charts. Magnetic field, voltage field and radio frequency (RF) strength measurements. Storage of up to 20 RF measurement records. Measurement memory and automatic shutdown with initialization function. Complete with 3 AAA batteries and USB power cable.