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Smallest spy micro earpiece in-ear Receiver in the world
ID: MRF400-B
Price: EUR 490

UHF smallest receiver - new type of spy earpiece !

Ultra-secret spy micro earpiece UHF FM in-ear receiver

In-ear prompter RF receiver, this is a FM micro earpiece, total invisible in the ear, used for covert communications and surveillance.

Key benefits:

  • This is the smallest UHF receiver ever made, that enters completely in the ear canal, without anyone to see it.
  • The working distance is 200 meters in open field.
  • The spy micro earpiece, MRF400-B in-ear receiver, has a black coat, for a better invisibility in the ear canal - the perfect camuflage, imitating the darkness in the ear.
  • No neckloop needed! No accessory on your body!
  • Undetectable for any detector!
  • Non jamming by any phone jammers!
  • No interference with any electromagnetic fields!
  • No billing for your conversations
  • Instant communication, without waiting calls or conditioned by the phone network
  • Secrete communication! your conversation will not be taped by phone operators and no leads to your location

What is it for:

This covert communication system can be used in various situations, like public speeches, TV presenter speaking, surveillance, presentations or to cheat on the hardest exams.

How it works:

If you need to have a covert communication, all you have to do, is to put the spy earpiece into your ear canal, in order to hear your partner. Your partner can be at a distance of up to 200 meters in open field or less (in a building area). Like the Beige earpiece receiver, it doesn't need any wires or accessories on the body, making it  a Champ of all earpieces on the market.

Technical specification for MRF400-B spy Micro Earpiece UHF FM Receiver:

Dimensions: 10 x 6 x 6 mm
Receiver mod: narrow-band RF receiver
Frequency: fixed UHF FM, crystal quartz controlled
Audio response: 200 Hz - ~4500 Hz
Audio signal output: 94 dB
Noise filter: soft squelch
Sensitivity: SINAD 17 dB @ E=2mV/m
Channel selectivity: 49 dB (at 200 kHz channel spacing)
Antenna: magnetic, integrated
Spurious emissions: below -51 dBm ERP
Distortion: 5% (depends on the volume )
Weight: 1.5 g (with battery)
Battery autonomy: operational time up to 5 hours
Current consumption: 1.8 mA
Type of battery: alkaline AG4
Working distance: 200 m, in open space

The MRF400-B spy micro earpiece UHF FM receiver is being delivered with 1 battery.

Image gallery:

black spy earpiece UHF receiver in the ear  in-ear receiver spy

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Spy earpiece UHF FM in-ear receiver


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