GRAD A-550 US is an ultrasonic rodent repeller equipped with a powerful ultrasonic transducer. This device is specially designed to protect large areas absolutely silently. The device can be used anywhere as it is capable of operating autonomously. It operates well both in heat and cold (from -40 to +50 °C / -40 to 122 °F).
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Effectively drives pests away even in large rooms The device has powerful ultrasound exposure and drives pests away not only from small rooms (living rooms, sheds, cellars, garages), but also from industrial premises (warehouses, hangars, granaries, etc.). Rodents have extremely sensitive hearing and ultrasound resembles them a hum of an airplane taking off nearby. They can’t bear with such a loud noise and leave the protected area. |
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The repeller can be used with people present The device operates in the ultrasonic frequency range (from 18 to 40 kHz). Therefore, it cannot be perceived by the human ear, so the repeller can be installed even in living areas. The device won't disturb people when they are working or relaxing — they just won't hear it. |
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A specially designed algorithm of ultrasound changeover provides maximum impact on any rodent without decreasing efficiency over time. |
If not possible to power the device by a 220 V network, you may insert 3 AAA batteries or use an external 5-15 V battery or a car's lighter socket (adapters are purchased separately). |
When the device is powered by batteries, it automatically switches to a special operating mode which significantly saves energy consumption only slightly reducing the power. |
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Delivery set:
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Model |
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Protection range |
500 m2 (5380 ft2) |
550 m2 (5920 ft2) |
1000 m2 (10760 ft2) |
1200 m2 (12900 ft2) |
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Number of ultrasound emitters |
3 |
1 |
4 |
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Operating frequency, kHz |
20-45 |
20-40 |
4-64 | 18-40 |
4-72 |
24-26 (with modulation 0.5-4000 Hz) |
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Ultrasonic pressure power, dB |
120 |
110 |
120 |
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Light flashes deterrence |
no |
no |
no |
no |
yes |
yes |
yes |
Operating modes |
1 |
4 |
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Author's ultrasound operation algorithm |
no |
yes |
yes |
yes |
yes |
yes |
yes |
Radiation power adjustment |
no |
no |
no |
no |
yes |
yes |
yes |
Sсheduled operation |
no |
no |
no |
no |
no |
yes |
no |
Silent operation |
yes |
yes |
no |
yes |
yes |
yes |
yes |
No addictive effect |
yes |
yes |
yes |
yes |
yes |
yes |
yes |
Power supply |
220V network |
220V network, 3 AAA batteries, external source |
220V network, external source |
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Dimensions |
75 x 122 x 122 mm (2.95 x 4.80 x 4.80 in) |
85 x 65 x 75 mm (3.35 x 2.55 x 2.95 in) |
109 x 65 x 25 mm (4.30 x 2.55 x 0.98 in) |
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Weight |
340 g (12 oz) |
120 g (4,2 oz) |
95 g (3,3 oz) |
120 g (4,2 oz) |
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