Overview:. 100% Brand new and high quality!. This machine should be installed 80-120 centimeters away from the floor. and should be vertical to the floor and plug into the power socket. The installation point should be avoided from carpet, curtain, etc.. the decrease of the sound pressure will do harm to the helminths effect.. This machine can be plug directly into an AC220V(or 110v)power socket. Note:. Please make sure if the plug fits your country's standard.. The effect is more obvious after a week.. Specifications:. Size: 90x56x50mm(approx). Frequency ranges:22-65KHZ. Power:AC 90V-250V 50-60Hz. Effective coverage: 80-120square meters.. Package Content:. 1x Ultrasonic Pest Repeller