• Effective ultrasonic repellent for rats and mice. • Ultrasonic waves that stimulate the nervous and auditory systems of rodents. • Power of 8W per device, total of 16W. • Four operating modes: Mode 1 (blue), Mode 2 (green), Mode 3 (yellow), Mode 4 (red). • Coverage of up to 140 square meters per device, 280 square meters in total. • Exclusive indoor use, without obstructions. • Non-toxic, no radiation.