Powerful Low Frequency Sound - Premium Ultrasonic Pest Repellent Emits Powerful Sound heard by Human and Most of the Mosquitoes with enhanced frequency to ensure NO unpleasant insects will bite you One Device for Indoor and Outdoor Can be used Home, apartment, travel, picnic, camping and so on, it covers the area around you and repel irritate and drive most mosquitoes away using sonic waves Easy to Carry, Effective and Modern Design Perfect for Outdoor Sports, Yoga, Running, Fitness, etc. Compact and unique design with a convenient holder will fit any Backpack and Clothing Safe Non-Toxic - No more creams or toxic sprays! Our product is 100% safe and won't hurt you or even the mosquito, it will just make them stay away from you. Portable Ultrasonic Great Gift - One of the easiest outdoor ultrasonic pest repeller on the market to use