Spy Development ™ - Products - Voice Activated Transmiters

UHF Transmitters

Voice activated transmitters are designed to save battery power when there is no conversations nearby.
The bult-in voice activation system automatically turns the transmitter on when voice is detected and turns it off when there is quiet in the environment. It extends battery life up to months and years.

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

Miniature voice activated (VOX) transmitter series

The smallest transmitters with the VOX feature. They can be easily concealed anywhere.
Their battery standby time is maximized up to many days and 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

Long term voice activated VOX series

These transmitters are ideal for applications when the access for changing batteries is difficult.
They will work for months and years after the installation without the need to change batteries.

SLV-57 UHF long term transmitter with voice activation system and automatic microphone gain control. Powered by AA batteries. $245.00 119.00

SLV-68 UHF ultra long term transmitter It also has voice activation system and automatic microphone gain control. 6 years standby time. No need to change batteries. $265.00 129.00

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.