Spy Development ™ - Products - Miniature transmitters

UHF Transmitters

Read the article about the advantages of our UHF transmitters in the Help section.

Voice activated (VOX) series

The built-in Voice Activation System extends battery lifetime. It automatically turns the transmitter off when there is quiet and turns it on when voice is detected. It maximizes battery lifetime up to months.

SMV-20 Miniature UHF room transmitter with voice activation (VOX) system and automatic microphone gain control. $245.00 119.00

SMV-25 Miniature UHF room transmitter It incorporates voice activation system and automatic microphone gain control. $245.00 119.00

Prolonged performance Zinc Air series

The smallest size of the transmitters is combined with the longest battery life in transmit mode.
The latest technology - the highest capacity Zinc Air batteries made this possible.

SZA-12 Ultra-miniature UHF transmitter Take a look at its size. Powered by the highest capacity Zinc Air battery. $255.00 124.00

SZA-18 Ultra-miniature UHF transmitter Very small size and automatic microphone gain control. Powered by the highest capacity Zinc Air batteries. $255.00 124.00

SZA-24 Miniature UHF transmitter The longest battery lifetime and automatic microphone gain control. Powered by the highest capacity Zinc Air batteries. $255.00 124.00

Basic series

The best choice when VOX is not needed and ordinary Lithium batteries are prefered.

SM-20 Miniature UHF transmitter Powered by Lithium battery. $235.00 114.00

SM-25 Miniature UHF transmitter Powered by Lithium battery. $235.00 114.00

Note: All transmitters are supplied on the strick understanding that they will be operated in a lawful manner. It is the purchasers responsibility to comply with the laws in their countries. We decline any resposibility for use of these devices. For more information read the Terms of Sale.