Crystal controlled UHF audio transmitter

The Crystal controlled UHF audio transmitter is an extremely minute transmitter (only 9 x 18 x 3mm) which can be easily concealed in articles of clothing, footwear, jewelry and accessories, furniture, electric and electronic appliances, packaging items, communication means and even room finishing materials. It has a small 3V lithium battery which makes it ideal for concealment. It can give output for a distance of 500-700m in open field. It is a highly sensitive device and can pick up even the faintest of sound with a good quality audio performance but the performance does depend on environmental conditions. This transmitter is best used with our line of specifically designed receivers.

It has the features of automatic gain control plus you can get microphone cable length on request. It offers different outputs from the product within a 10mW to 30mW range by applying different power supply voltages. It has the added benefit crystal frequency control and consumes very little power.

The transmitter can be also concealed into:


• Pieces of clothing and footwear
• Jewelry and accessories
• Pieces of interior and furniture
• Room finishing materials
• Home electric appliances and electronics
• Items of packaging
• Communications means

The camouflage used should ideally be a strong dielectric with a low RF absorption ratio. Metal surfaces should be avoided as it reduces the efficiency of radiation. Choose a power supply only after consulting its current value mentioned in its data sheet and it must not be less than the product's consumption current.

Special characteristics


• Super compact (9 × 18 × 3 mm)
• High quality audio
• Low power consumption
• Wide range of power supply voltages
• Variable output power
• Crystal frequency control

Endoacustica is now a renowned producer and distributor of only the cutting edge in surveillance systems technology. Our range of products encompasses everything from: crystal controlled UHF audio transmitter, UHF micro transmitters, UHF audio transmitters, miniaturized audio transmitters, hidden transmitter, micro bug, audio bug, UHF bug, remote listening device, audio surveillance.