Introduce Product     

1.Auto detect the wireless signals, when there is unknown wireless signals, the detective pen will give the color light automatically
2.Press the key when you want to check the money fake or not , dont touch the cap of a pen at first , the blue light flashes once while the it begins to work, and please dont release the key until the detection is ended.
3. The color light flash will be stronger and stronger when the detector is nearer to the suspicious transmit, then you can touch or hold the cap of a pen to reduce the sensitivity of the detector. until find the source of the signal
4. Change the batteries if the red light cant be lit any more. Please screw off the battery lid and remove the old batteries , install four new LR-44 batteries matching correct (+) and () poles as indicated, then screw the battery lid back.
Detective Area:
Detects a radius of 10 Meters and can precisely detect wireless signals of 900/1200/1300 and 2400 /2600/3000MHz.
Color  Flash:
The flash will increase when approaching the source of the signal.
Auto detective Design:
Professional RF Detective Design. The pen will give you 24 hours a day privacy protection. Function saves power and prevents interferences . Has built in protection to prevent most mobile phone interferences.
Easily Attaches to your Keys, Car, Gym Bag, Inside Purse or Briefcase.
Specification
Battery :4.5V, using LR-44 x 3 pcs (Included)
Detective Output: LED flashing (Color light LED)
Detective Induction Degree: 100MHz~3GHz
Working Current: 30uA
LED Flashing Current: 1mA
Operating Instructions
Detector Dimension:146x Φ 10mm . compact size