Sound Activated FM Transmitter
Sound turns on the transmitter, which operates in the FM radio band. A neat way to catch a thief in another room or garage. The volume of sound needed to trigger the circuit is adjustable. The two stage transmitter has good range and the circuit powers down unless it hears sounds; reactivates with a sound. Operates on two double AA batteries (use a 9 volt to increase range).
- L: 2-1/2" W: 1-1/2" H: 3/4".
- Requires 2 - AA volt batteries.
- Sensitivity user selectable.