Product Description:
This device is a professional wireless spy kit for cordless Audio Monitoring applications. Microphone sensitivity is 15dbm. It is able to pick-up whispers / footfall within 2 meters away. Transmission range is 100+ meters in open area. Battery life for receiver is 9+ hours, for transmitter is 4+ hours.
The ISM/VHF spy voice bug is featured by original circuit design, US professional IC and STD techniques. It is highlighted by tone clean, short antenna, small volume and tiny size.
UHF Spy Audio Bug Monitor Specifications:
Transceiver frequency is fixed for ISM/UHF band
Using soft-antenna or 2cm fixed antenna
Transmission range is 100+ meters in open area (depends on circumstances)
Use CR2 3V Li-M battery, lasting 9+ hours for monitor or 4+ hours for transit
Both size of microphone transmitter and receiver are 35 x 50 x 21mm
User's Guide:
• Load battery correctly. Put power switch to "ON" position and enter into working status. Extend microphone's antenna, lay or affix it at 1~5 meters away from voice source. You can monitor the local voice (adjustable free) from 10 meters away after powered on the switch and inserted earphone or speaker.
• With corresponding 3 way connector plugs, you can link recorder with receiver and record information while monitoring.
• The receiver is oriented when voice source is too far. Please adjust the direction of receiver. Usually make antenna vertical to the floor and turn around to find the strongest signal. When used in building concentrated area, signal density may varied a lot due to obstruction and multiple reflection, and cause blink spot eventually (the signal appear faint in short range). How to select the appropriate received spot and the position of monitor is extremely important. Put receiver at elevated or open area. Or close to window as possible when used indoor. The fewer building obstructed between receiver and microphone, the longer transmission distance you will get.
• Transmission range is closely related with operation conditions and weather conditions. Open area is better than building concentrated area. Higher is better than lower. Vertical wave (antenna vertical to floor) is better than horizontal wave. Suburb is better than downtown. Night is better than daytime. Customer can make good use of microphone and receiver based on the characteristics mentioned above.
• Please replace the battery in time when transfer distance is being shortened, or voice is distorted, or hum increased, etc.
• Remember this device should only be used where it is not infringing any laws.
