Mouse Repeller Mobil Art.-No.: 66950 Disturbs hungry rodents The Mouse Repeller Mobil is a small gadget designed to prevent mice and rats from entering the house by emitting ultrasound at a frequency of 35.000 Hz, inaudible to human ears, but an unbearable noise for pesky rodents. For indoors and sheltered outdoor areas. Specifications - Covered area: approx. 40 m² - Frequency: ca. 35 kHz - Interval: 15 sec. ON, 45 sec. OFF (indicated by status LED) - Power supply: 4 x 1,5 V AA batteries (not included)