Feature: 1. Using advanced military grade chip, with powerful technology, wireless signal and magnetic field signal processing technology. 2. With automatic detection function, a large scale detection can be completed in a few minutes, eliminating all suspicious risks. 3. Effectively prevent eavesdropping, video recording, fraud, and protect private data and information confidentiality. 4. The operation is simple and easy to carry. Strong anti‑interference, high sensitivity, wider detection frequency range. 5. Suitable RF frequencies from 1MHz to 6.5GHz, including GSM, WIFI BT, , VHF, UHF, 900/1200/2400 wireless audio and video transmission frequencies. Specification: Item Type: Signal Detector Model: K-68 Material: ABS Colour: Black Function: Signal Detection Frequency Range: 1MHz-8GHz Detection Dynamic Range: ＞73dB Detector Sensitivity: ≤0.03m Detection Range: 2.4G: 10 Square Meters (Standard 10mw) 1.2G: 10 Square Meters (Standard 10mw) Mobile Phone Frequency Band 2G, 3G, 4G Signal: 15 Square Meters Function Audio-visual Quantification: 10-level Digital Tube, Buzzer, Vibrator Indication Highly Sensitive Magnetic Sensing Probe Detection Distance: Within 10m / 33ft Battery Type: Built-In 1200mAh Lithium Battery (Full Charge in 3 Hours) Working Time: 8-10 Hours People: 1. People who often use bank cards 2. People on business trips who use hotels as their home 3. Beautiful women who are easy to be photographed 4. People who often go to public entertainment venues to consume 5. People who often go to various shopping malls to try on 6. People who respect their own and others' private information 7. Those who contact and keep business secrets 8. Security personnel of business secrets and technical secrets 9. Anti-sneak shooting and anti-eavesdropping professionals Scope of Application: 1. Whether the car or office is equipped with a wireless or tracking locator. 2. Whether your mobile phone is tapped or abnormal (transmitting signals outside no reason during standby) 3. Whether there is base station radiation in your working environment and on the roof of residential building 4. Mobile phone text messaging, Internet access, call monitoring 5. Wireless network, mobile phone base station, wireless monitoring system monitoring 6. Electromagnetic radiation leakage detection household appliances, such as microwave ovens, etc. 7. Is there a suspicious wireless signal in the environment 8. Check hotel toilets, hotels, entertainment venues, changing rooms, politicians, etc. 9. Business negotiations, school proctoring, workshops, military facilities 10. waves coincident with movements on the mahjong table 11. Mortgage car, second-hand car, pawn shop, guarantee company, small loan company, information finance company, etc Package List: 1 x Detector 1 x Probe Tube 1 x Data Line 1 x Manual How to use: Turn the knob clockwise to turn on, and adjust the sensitivity to 3‑4 gears, the machine enters the detection mode, the closer to the signal source, the higher the indicat, and the buzzer alarm sounds.