Aspectek HR131 Upgraded Powerful Yard Sentinel, Dark Green THE ORIGINAL: The first and most popular ultrasonic electronic pest deterrent on the market, with coverage up to 5,000 square feet. Get rid of pests fast throughout your property. Inaudible Ultrasonic and audible Sonic Volume combined use are more perfectly to repel animals. (NOTE THAT if the Sonic Volume bothers you or your neighbours, please turn it down through the volume dial. The ultrasonic signal will still be effective in repelling pests) USE ANYWHERE: Day, Night or 24-Hour(3 Modes) protection for your garden, lawn, cabin, shed, attic, farm, barn, warehouse, patio or wherever safe and effective pest control is needed. Device Installation: The ultrasonic sound emits in a forward direction from the device with a range of about 170 degrees horizontal and 60 degrees vertical. EXTENDED COVERAGE: The most powerful PIR infrared motion sensor available. Use the sonic repeller setting or adjust so it is completely quiet inaudible to humans.Note: Do not cover the sensor. WEATHERPROOF: Unique seal and design lets you set it anywhere. The Yard Sentinel comes with the longest extension cord on the market, or use batteries (not included). For cabin and camp owners: Other power accessories are available. [Operating temperature: 14  to 122 ] INTELLIGENT POWER SOURCE: Come with AC adapter and 33 ft extension cord. Requires 4 C batteries (NOT included). AC power will take priority over battery when both are installed. The Device can be used in remote areas without traditional power outlets by connected to a 12V D/C Sealed Lead-Acid battery using our special extension cord with alligator clip and D/C power plug cigarette lighter power outlet with our special adapter cord.