Shootingstar Ultrasonic Pest Repeller Plug in Upgraded Indoor Ultrasonic Pest Reject 6 Pack Pest Control Pest Repellent Sonix Repeller for Rodents Cockroaches Insects Bugs and Ants

Product Specifications Rated Power?1W Power Voltage: AC 110?220V Power Frequency: 25-65KHz Effective Coverage Area: 800- 1200 Sq. Ft./unit Package Included: 6 packs   Indoor Use Only 1. This pest repeller should be avoided to be in the back of a huge obstacle such as curtain, fridge and sofa. 2. This ultrasonic pest repeller should be avoid in the front of curtains, cloth sofa or other furniture made from cloth. 3. It's normal that the mouse and vermin will increase at the beginning of the using days because they are getting away from the living place after the attack of the ultrasonic. Usually, it will take 3-4 weeks to notice results.