Detecting Frequency Range: 0MHz ~ 6.0GHz Four modes of Detection: vibration, silent, voice and earphone Detection Indicator: LED initiator shows signals strong or week in 4 levels Detecting Distance: up to 10M (33ft) depends on output of Transmitter Detected Sensitivity Control: Adjustable allowing you to detect those not so easy to detect Indicating DescriptionRF are simply a radio frequency receiving device. It is designed to detect wireless signals that are transmitted within a given frequency range. A wireless hidden camera is designed to transmit video to a video receiver and some wireless transmitters designed to transmit, to the extent of 3 miles away, while others can only be received one room away. So strong is the signal is transmitted the Read More