Intelligent frequency conversion 7-band ultrasonic wave cyclic sweep, various frequencies work together to interfere and stimulate the mosquito's auditory system, making it feel uncomfortable, achieving the effect of mosquito repellent. Safe and healthy mosquito repellent is made of high-quality ABS material, physical mosquito repellent, does not contain chemicals, is non-toxic and has no electromagnetic wave radiation, and can be used by adults and children with confidence. USB charging built-in smart chip, can be charged by laptops, mobile power supplies, etc., convenient and fast, energy-saving and environmentally friendly. Easy to use One-button start, multi-functional ultrasonic wave forms a sound barrier, low noise, and can provide a quiet sleeping or working environment Easy to transport With its own hook, it is small and light and can be hung at will, which is very suitable for indoor and outdoor activities such as home, bedroom, travel, camping, hiking, etc. Working principle: Portable electronic mosquito repellent, according to the principle of physics, uses electronic simulation technology to emit various sound waves to stimulate the brains of mosquitoes and insects, making them feel uncomfortable, thereby achieving the effect of mosquito repellent. Features: 1. Intelligent frequency conversion, designed for mosquitoes, full sound wave coverage, effectively repelling mosquitoes. 2. Silent and silent, built-in smart chip, energy-saving and environmentally friendly, can provide a quiet and comfortable environment. 3. Safe and reliable, high-quality ABS material, physical ultrasonic mosquito repellent, safe and harmless to the human body. 4. It has a simple appearance and comes with a small hook, which can be hung on clothes, backpacks, and carried with you. 5. It has a wide range of uses and is suitable for repelling mosquitoes, mice, spiders, ants, cockroaches, fruit flies and other insects and rodents. Specifications: Color: Black Material: ABS Voltage: 5V/1-2A Rated power: 0.007W Working current: 1.8 mA Sound frequency 15-95KHz Output frequency: 13-95KHz Effective range: 10-70 square meters Battery type: 100mAh lithium polymer battery Power supply: USB charging (support fast charging) Product Features: 7-band ultrasonic cycle scanning Package: 1 x Insect Repellent 1 x USB cable 1 x Hook