Various effective measures for counter investigation:
    Option A: intense red laser lights to expose all kinds of hidden cameras both wired and wireless.
    Option B: wireless detection to expose wireless covert equipments including wireless camera, bug,
GPS tracker, mobile phones, jammers, long range frequencies between 1MHz to 6.5GHz.
Additional application with earphone ensures a covert detection.
Suspected objects can be traced out by rating signal LED lights flash gradually.
Adjustable sensitivity for detection.
Built-in rechargeable Li-battery can ensure a non-stopping detection for 5 hours.
Easy to travel not only because as small as lighter, but also as light as match box.
User friendly and message can be easily understood.