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Start/Shut down the machine
When start or shut down the machine, you just need to press the function key for three seconds (it will send out the "tick" voice when starting the machine), which can be operated like the cell-phone.

Switch over sound/mute
After starting the machine, it works in the default mute detecting mode. If you press the function key once to make the green light blink, it works in the sound detecting mode. If you press it again, it returns to the mute mode.

Automatic Shut-Down
Over 4 minutes after it starts the machine, if there is no signal been detected, it will automatically shut down; if it detects out signal within 4 minutes, it will automatically re-calculate the delay time used for automatic shut-down.

Cancellation of Automatic Shut-Down
If you press the function key 6 times in succession within 3 seconds, indicator "auto power off" is on, you can cancel the default automatic shut-down function. If you repeat this operation once more, it will return to the default function.

Indication of Low-Voltage Battery
If the functional indicator becomes red from green, it represents that the battery voltage is low which needs to be replaced by new battery.

Detect wireless candid-camera and wireless eavesdrop signal
If it detects out wireless candid-camera and wireless eavesdrop signal, it will send out the "Bi Bi" voice (in sound mode), and the functional indicator will distinguish, the 4 signals strength indicators will vary with the signal strength. If the signal indicator is in full bright, it represents that it has been close to the suspicious signal source. Shorten the antenna length and reduce the detecting sensitivity to narrow the detecting range, until it finally finds the position of the signal source.

Detect signals cell-phone signal and base station radiation of the cell-phone
If it detects both the signals cell-phone signal and base station radiation of the cell-phone, it will send out the Telephone Ring (in sound mode), the 4 indicators of signal strength will vary with the signal strength, it is cell-phone signal when the functional indicator is bright. If the functional indicator distinguishes, it is a base station signal when "B.S" the signal indicator is bright.

Usage skills
Pull out all antennas and hold the detector while moving forward. If weak signal shows, slow down the moving speed, change the antenna direction slowly, adjust the antenna length, and look for the signal to show stronger direction, until the goal is found.

Signalling frequency and antenna length relations
Detects the sensitivity and the antenna length related, the inappropriate antenna length can directly affect detects the sensitivity. Wireless detects 5.8GHz to photograph surreptitiously the signal, the antenna pulls out 1 to 1.5; Wireless detects 2.4GHz to photograph surreptitiously the signal, the antenna pulls out two; Detects below the handset signal and the 1GHz other signals, completely pulls out the antenna.