Check the listing for details. Pest Repeller PRO-Reject for Mosquito Mouse Roach Spider Bug. Condition: New. Listed at 29.99 USD. Note:Please do not take it in super mode for a long time.Sound is harsh and make youuncomfortable. Product specifications：( 1) Power Voltage : AC110V / 50HZ-60HZ( 2) Power Consumption : less than 30W( 3) Frequency CoverageSuperlow electromagnetic wave : 0. 8HZ----8HZ 160 intervalNo.1Ultrasonic wave : 64KHZNo.2Ultrasonic wave : 34KHZ 80 " intervalNo.3Ultrasonic wave : 55—100KHZNo.4Ultrasonic wave: 22-50KHZ 80 " intervalMechanicalwave ( Vibration wave and sonic wave ) :400HZ 5 interval Package Includes:CQOOUltrasonic Pest Repeller PROPackingbox with instructions Instructions:( 1)Never use ZB018 outdoors and never put it in high-temperature and moist places( 2) AC 110V / 50HZ-60HZ power system must be confirmed before using it vv( 3) ZB018 should be working continuously without stopping( 4) It should be installed as low as possible from the ground because most of themice running on the ground Moreover there should be no obstacles in front ofZB018( 5)The effects will be seen after using it continuously for 3-4 weeks . Sometimesthe mice may be more active at the beginning which shows the mice have beenirritated . Then they will flee away gradually after a period