Upgraded SereneLife Mosquito Repellent, Insect Pest Control, Electronic Insect Killer, Chemical Free Insect Repellent, Ultrasonic Pest Repeller, Portable - Up To 320FT Coverage Area (PSLMRP15) NO CHEMICALS: The ultrasonic pest repeller includes 8 citronella oil pads that emit a safe, pest repelling aroma, without the use of any harmful chemicals to you or the surrounding environment PORTABLE SIZE: The compact size of the ultrasonic pest repellent makes it easy to use inside the home, in the yard, on campsites, hiking, etc ULTRASONIC TECHNOLOGY: This mosquito killer emits a safe and harmless ultrasonic sound, saving you and your guests from excess noise. The quiet sound waves will send all unwanted bugs and insects scurrying EASY TO USE: The mosquito repellent features simple button controls and a compact size for ease of use anywhere you need extra protection FULL COVERAGE AREA: Despite its size, the bug repeller covers a lot of ground, up to 30 square meters. The repellent offers full protection in a convenient size