Do you know you are exposed to more and more electromagnetic field (EMF) radiation that may cause harm to your health and well-being. This EMF hunter will detect EMF strength of all electrical appliances in your environment, and the manual tells you how to protect you from this danger. EMF Hunter stands out from other high end detectors. For cell phones, power lines, and all other electrical appliances, as well as ghost hunting. 3 dimensional detection means easy, accurate and speedy detection. Superior accuracy, measures low frequency and high frequency radiations precisely with numerical bar display. Visible in the dark, both visual and audible alarm gives clear indication of radiation levels even in the dark. Unique temperature reading capability to detect elevated temperature as a result of EMF exposure. Color code of safe/caution/warning with light-emitting diodes (LEDs) to indicate the EMF and HF radiation strength. Indications: Green light: No EMF or HF radiation detected or it is at safe level. Yellow light: EMF or HF radiation is strong. Red light: EMF or HF radiation is very strong. Temperature (option with temperature sensor purchase): 32 - 102 degrees. Warning at 99 degree. Perfect to use in the light or in the dark. Use this meter to choose the appliances with the lowest radiation, stay away from dangerous radiation sources, and popular for ghost hunting. Battery: 9V (not included). With visual and audible alarm. Detailed numeric bar display, 10 LED lights with color coding for safe/caution/warning. Frequency range: 30 Hz to 5.5 GHz. Differential switch between low and high frequency. Option to add temperature sensor. Current: equals to 25 mA. LF range: 30 Hz - 5 KHz, HF range: 500 KHz - 5.5 GHz. Calibrated at 50/60 Hz and 2.4 GHz. Measures 6cm length by 2.6cm width by 13.4cm height. One year warranty.