How does combo bird repeller with ulso X technology work?
Working principle of Sonic birds repellent device – Industrial bird control
The Sonic Bird repellent devices use a natural predatory principle. Because Pigeon repeller scares unwanted birds and pigeons away from your warehouse, factory and agriculture land. The built-in sensor can detect the movements of the Birds. Because there is powerful loudspeaker broadcasts sonic sound or predatory calls of the hawk, falcon, eagle, and owl species, that sound threaten the small bird. Bird repeller is a fully automatic bird control device to solve pigeon problems in industries & factory. Sonic Bird control with ULSO technology is most effective technique for Industrial Bird problem.

The new Industrial bird deterrent device for Birds and Pigeon control
The Effective Bird repellers Sonic with Ultrasonic Device is used to Boost the power of the Integrated Bird repellent System. Because ultrasonic repellent spread ultrasonic sound waves . The ultrasound is inaudible to humans. And it give the frightening scream to the Birds and make them go out. The ultrasonic bird control is creating a non comfort zone for the birds. So the birds do not like to come and sit again at the roof or wall.

Bird repellent combo repels birds with modulated Sonic with Ultrasonic. The pigeon repellent combo model with 2-speakers system emits sound sonic as well as ultrasonic. Both audible and inaudible sound to humans by bird deterrent creates a powerful attacking sound so that birds are confused. Industrial Ultrasonic Bird deterrent devices help keeping birds away in the industries.
https://www.conceptmart.com/products/concept/bird-repellent-devices/