Ultrasonic Pest Repeller, New Pest Control Set of 6-Packs Electronic Plug in Repellent Indoor for Flea, Insects, Mosquitoes, Mice, Spiders, Ants, Rats, Roaches, Bugs, Non-Toxic, Humans & Pets Safe

Product specifications? Frequency range: 10 KHz~65KHz Input voltage: AC90V~250V / 50~60HZ Effective range: 800~1200 Square Feet Installation height: 30cm from the ground Power: 2~3W Package Includes: 6 X Sumpol Ultrasonic Pest Repellents Packing box with instructions Instructions: 1. This machineshould be installed at 30cm away from the floor and should be vertical to the floor and plug to the outlet. 2. The installing point should be avoided to be in the back of the curtain, fridge, and any other furniture that deterring or attaching frequency. 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 ultrasonic. Normally, it could take 3~4 weeks to notice results. 4. To increase the effect, you should use the several devices at the warehouse or several rooms.