This User Manual includes key features, operating instructions, intended use, maintenance, repair, storage
and transportation of microphone, dictaphone and voice recorder jammer "BugHunter DAudio bda-4 Voices"
(hereinafter – the Device).
The Device is designed to protect conversation areas from eavesdropping. The Device blocks wireless
microphones, tape recorders, wired microphones and most of professional digital voice recorders including
voice recorders installed in mobile phones (smartphones). Ultrasonic inaudible signal* as well as acoustic
speech-like noise signal** are used in jamming eavesdropping devices.
*Ultrasonic pressure level of the operating Device at a distance of 1 meter (3.3 feet) or less may exceed the
maximum safety level of emission for people. This may cause unwellness.
**The manufacturer cannot guarantee that if you use only ultrasonic signal (or insufficient level of
acoustic speech-like signal volume) all voice recorders and recording devices will be jammed.
Before using the Device, please carefully read the present User Manual.
Follow the rules, restrictions and instructions contained in this User Manual in order to increase the lifespan
of the Device and to use it more effectively.
1.
DEVICE DESCRIPTION AND OPERATION
1.1. It is a stationary device designed to protect conversation areas from eavesdropping.
1.1.2. Device operating instructions:
- Surrounding air temperature,................................................................... from +5 to 55
°
С (from 41 to 131
°
F)
- Relative air humidity at 25
°
С, %.......................................................................................................... up to 98
- Atmospheric pressure............................. from 66,6 kPa up to 106,6 kPa (from 500 mmHg up to 800 mmHg)