Spy Development ™ - Help Section

What is a UHF transmitter?

Many visitors ask Spy Development what is the difference between a UHF transmitter and a VHF device or FM bug.

Both a UHF transmitter and an FM bug are intended to transmit voice or any other sound wirelesly to a receiver.
UHF (Ultra High Frequency) range gives many advantages for a wireless listening device over VHF and FM frequency bands. A UHF voice transmitter is much more efficient in every way than any VHF or FM bug.
A UHF transmitter is much smaller in size and very lightweight. It has better sound quality, much longer reception range and many times longer standby time than any of the VHF and FM bugs.
When we talk about serious, professional or long term usage of voice transmitters, all of the above are the key features to choose a UHF transmitter.

Let's add some detail.

The main advantages of UHF Transmitters.

Sound pickup.
The main advantage of our products is the sound performance. Our know-how is the Automatic Gain Control system. Any of our transmitters are equipped with this system. Working together with very sensitive microphone the AGC system automaticaly adjusts the amplification of the sound allowing the quietest whisper far away from the microphone to be picked up and heard loud and clear.

Standby time.
Our development allows a voice transmitter to consume many times less power than our competitors' products.
Standby times of our UHF transmitters equipped with the Voice Activation System (VOX) allow them to work for months after installation without changing batteries while ordinary UHF and FM bugs work several days and then you have to change the batteries. This makes a great difference because it can be hard to access the transmitter to change the batteries often after it was installed in a place.

Reception range.
The efficiency of the UHF listening equipment makes the reception range of the transmitted signal much longer compared to VHF or FM bugs and other listening devices, especially that in modern cities.
Our special high performance, high efficiency design of UHF transmitters maximizes the advatages of the UHF band and makes the reception range longer at less power consumption than our competitors' UHF products.

Size does matter.
Very small size of the UHF transmitter bugs allows them to be easily concealed anywhere and makes it hard to detect the installed devices.

All of the above are combined in very small, lightweight and reliable UHF transmitters

 

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