Features 1、1.【Human/Pet Friendly】This portable ultrasonic insect repellent adopts a frequency conversion design, which uses ultrasonic waves to continuously change the frequency to stimulate the hearing system and nervous system of the pests and keep them away from the area. Ultrasound only affects specific organisms! Pure physical ultrasonic mosquito repellent is safe and quiet for children/the elderly/pets. 2、2.【One Key Operation】Insect repellent with LED status indicator to let you know the ultrasonic is working. Press and hold the power button for 0.9 seconds to turn it on or off. When working, the light flashes every 3.7s. Control the switch with a simple button. It will automatically shut down after 7.3 hours of time when it is turned on. 3、3.【All Day Protection】This smart ultrasonic bug repellent can protect you in any activity, as a portable device, the size is only 5.7*3.4*1.6cm, 2.24×1.7×0.63 inches; 150 hours of long-lasting battery life, no matter what you're doing, no matter where you're going, you can keep your whole family protected together. 4、4.【Portable and Fashional】Back clip and hanging hole design. Easy to carry, perfect for outdoor sports, yoga, running, fitness, and more. The compact and unique design with a convenient stand fits any backpack and clothing. Suitable for various scenarios: sleep, travel, picnic, mother and baby, home, pet safe. Specification Material: ABS Size: 5.7*3.4*1.6cm, 2.24×1.7×0.63 inches Battery: 2025 button battery Battery life: about 150 hours Applicable occasions: Can be used indoors and outdoors Package List 1* Mosquito Repellent Clip 1* Button Battery