Features: More sensitive than other electromagnetic radiation detector, wide measuring range, has a long service life. Smaller body, larger screen, clearer measurement data and easier operation. Can be applied to material inspection, environmental test, radiology protection, radiopharmaceutical screening, etc. With mute, alarm, particle sound button, test, mean value reset retest button, backlight can be turned on or off. Specifications: Model: No batteries Type: Electromagnetic Radiation Detection Screen size: 57 x 43mm / 2.2 x 1.7in Battery: 3 * AA battery (not included) Test range: S 0-99.999 w/cm (power density) E 0-99.999 V/M (electric field strength) H 0-99.999 T (magnetic field strength) Test Accuracy: S 0.001w/cm (power density) E 0.01 V/M (electric field strength) H 0.001 T (magnetic field strength) Frequency Range: S 50MHZ-5GHZ (power density) E 20HZ-100MHZ (electric field strength) H 20HZ-1MHZ (magnetic field strength) Material: Plastic colour: black Package Contents: 1 x Electromagnetic Radiation Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.