PRODUCT DESCRIPTION UPGRADED K2-B Deluxe EMF GHOST HUNTING Meter (built-in constant on or off switch) with LOW VOLUME SOUND and with INSTRUCTIONS- -Has the SAME EFFICIENCY and POWER as the ORIGINAL K2 meter. These models have been used in hundreds (if not thousands) of investigations with outstanding results. NOTE This is a KII that provides an audible LOW VOLUME sound when EMF is detected. The sound produced is LOW so as not to interfere with the investigation. The low volume sound it produces is similar to that of a Geiger counter and the sound intensifies (gets louder) as each of the detector's bars lights up. Note again, however, that the sound is LOW so as not to interfere with any evidence being collected. ALL other KII specifications and operating functions are the same as for all other KII meters. Model KII-B The KII-B simply takes the popular KII meter and adds a low volume buzz sound when EMF is detected. The sound feature allows a paranormal investigator to see the illuminated LED lights and hear EMF detection simultaneously. Unlike a standard KII, this allows the investigator and others to physically hear the EMF change as it occurs. This audible technology also helps validate your experience as someone usually runs a recorder or DVR that will pick up the audible EMF change. Excellent audible alert for monitoring EMF change in a remote location. The audible buzz increases as the EMF field strength increases. These are the units used by the PROS, including TAPS (the paranormal group featured on the SCI-FI Channel TV show Ghost Hunters). If you want a high-quality EMF meter, the one used by the pros, THIS IS WHAT YOU NEED =) Electromagnetic fields, or EMF, are emitted by electrical appliances of all types. EMF is everywhere, from appliances, cell phones, electrical wiring, and even the human body. The K-II EMF meter helps measure these fields to identify appliances producing high emissions, allowing users to make informed decisions about limiting exposure. EMF fluctuations have also been associated with locations where unexplained phenomena have been reported, including alleged ghost stories. The K-II is powered by a single 9V battery and reports EMF readings in five milligauss increments. Instant response to EMF fluctuations and spikes Detects ELF range (50 to 1,000 Hz) and VLF range (1,000 to 20,000 Hz) Simple push-on or push-off operation Easy-to-read multi-segment LED display 5 percent accuracy at 50-60 Hz Products from GuanGuan's store