⭐ Top self defense tools
So you would like to record audio covertly without raising any suspicion? This Covert Audio Transmitter Bug is worth a look. It is a miniature UHF transmitter that measures 15mm in diameter. It has an operating band frequency of 400-470Mhz.
The bug can transmit audio over up to 650 feet, depending on the environment. You can find out more about it here.