The User Manual includes key features, operating instructions (intended use, maintenance, repair, storage
and transportation) of ultrasonic rodent repeller "GRAD A-550 US" (hereinafter - device).
The main distinctive feature of the rodent repeller "GRAD A-550US" is that the device operates in a silent
ultrasonic mode without causing any discomfort to people and pets.
Before using the device, please, carefully read the supplied User Manual.
Following the instructions, restrictions and guidelines contained in User Manual will extend the life of the
device and allow you to use it most effectively.
WARNING!
Before using, the device should be kept at room temperature for two hours after storing in a
cold room or transporting in wintertime.
The manufacturer is not liable for damage caused by improper use or failure to comply with this
User Manual.
1
DEVICE DESCRIPTION AND OPERATION
1.1
Device application
1.1.1 It is a portable device designed to deter rodents (mice, rats, moles, shrews) in gardens and indoors -
stockrooms, warehouses and utility rooms, etc.
Operating principle is based on intolerance of rodents to ultrasonic emission generated by the device.
Ultrasonic waves affect the nervous system of rodents causing them pain and discomfort. Rats and mice lose
their ability to take food, water as the result they try to leave the premises.
Note that the device has no harmful effect on people and pets.
The device runs under command of microcontroller with embedded software.
In comparison with other analogues, a distinctive feature of the device is constantly changing parameters of
ultrasonic emission. Repetition period of the sound pattern is more than 60 hours that eliminates habituation of
rodents to device’s emission and allows placing other devices at any distance without the occurrence of the
"fading sound" effect.
The device is powered by an external power source and by installed batteries that allows you to use the device
in places where there is no possibility to connect to AC power (e.g., at the open place in the garden).
1.1.2
Device operating instructions:
- Surrounding air temperature,
О
С ………………………………………from – 40 to + 50
- Relative air humidity at 25
О
С, % ……………………………………………….. up to 98
- Atmospheric pressure from 66,6 kPa up to 106,6 kPa ….. (from 500 mmHg up to 800 mmHg)
1.2 Technical specifications
1.2.1
Visual appearance of the device is shown on Figure. 1.
