Professional Grade Digital RF Bug Detector DD1206 Professional Grade. The perfect tool for searching for digital and analogue transmitters in the frequency ranges: Main antenna 40MHz  4Ghz, Auxiliary antenna 2.44 Ghz, Increased sensitivity to Bluetooth/Wi-Fi signals allows the operator to detect wireless sources at distance of 50 cm- 2 m Detects GSM, Bluetooth, Wi-Fi and RF, 16-segment bar graph indicator providing a wide dynamic range, 4 work modes: silent, sound, vibration and mixed Correlation function discovers FM-transmitters by the presence of sound is different than other detectors this unit can produce a loop-back effect A microphone transmitter will pick up the sound and transmit the beep. The demodulation display will pick up the transmission and flash simultaneously. Also, when the unit detects other transmission different sounds will come from the unit depending the type of transmission it detects 2 levels of sensitivity (attenuator), Durable metallic body, Microprocessor controlled, Includes the extra antenna allowing the device to avoid interference from external sources in cities or near broadcasting towers etc.Detects Bluetooth, Wi-Fi, DECT, GSM, and RF, Operation up to 20 hours, Power 2Xaaa, Frequency range, Antenna #1: 40MHz  4Ghz. Antenna # 2: 2.44 GHz Package Includes: Manual, Cleaning Cloth, 2 Antennas, Screw driver, 2 Batteries size AAA, Detector