F908 Wireless transmitter receiver Covert FM Audio Listening Device Ear spy bug

9V battery not include

 wireless transmitter receiver instructions

　　This product adopts the most new imported chips, circuit board design is advanced. The products meet the voice is the most clear, the most stable emission frequency,

the distance from the using effect. Can be used in various fields, to bring you a safe, convenient, rich and colorful daily life

Product features:

1 using the wireless transmitting and receiving technology, without any charges, the battery can be used directly.

2 the use of external environmental protection type lithium battery and 9V battery. After use can be removed at any time so as to avoid unnecessary waste battery.

3 the sound clear, ultra high sensitive clear pickup, at a distance of several meters away from the transmitter quartz clock "tick" sound can be heard clearly.

4 emitted from the emitter to achieve the best results. Open to straight-line distance of up to 500 meters or more, the situation is different neighborhoods as the

building up to a distance of about 50-300 meters.

5 dedicated highly sensitive receiver frequency is not within the scope of the public, the other device can not receive a strong confidentiality.

Instructions:

　　  First, the emitter connected to a 9V battery, and then straighten the transmitter antenna (ie black cord) the place where you need to listen,

open the rear cover on the receiver 3.7v lithium battery, put on headphones to turn on the power switch,

adjust the channel on the receiver adjustment button until the received signal sounds best so far.

Tone can be adjusted according to the size of normal use. (Button is shown)


Specifications:

Receiver Size: 788mm × 500mm × 165mm.

Receiver Weight: 53g (with battery)

Receiver Operating voltage: 3.7V

Receiver operating current :20-30ma

Transmitter Size: 270mm × 195mm × 150mm.

Transmitter Weight: 10g (without battery)

Emitter Voltage: 9V

Emitter current :15-40ma

 Accessories:

1x F-908 is a receiver.  

1x  F-908 transmitter one.  

1x  3.7V lithium one

1x  Headphones one.  

1x  Connect a USB charging cable.     

1x  Manual