Hanging Buckle Electronic Pest Repellent Usb Mosquito Killer For Pregnant Women Features: The product has no electromagnetic wave radiation, no noise pollution, safety and environmental protection, and can be used by pregnant women with babies at home. Applicable scenarios: outdoor travel, camping, fishing, outdoor work, baby supplies, pet deworming, safety and environmental protection, harmless to people and pets. This product mainly repels mosquitoes, but also has the same effect on cockroaches, flies, mice and other pests. How it works: Portable Electronic Insect Repellent This device is based on physical principles, using electronic simulation technology to achieve the effect of repelling mosquitoes and insects, by emitting various sound waves that can stimulate the brainsof mosquitoes and insects, because mosquitoes and insects cannot tolerate those sound waves for a long time, So they stay away from these areas. Note: 1. If the product is not used for a long time, please disconnect the power supply. 2. Recommended to use a regular brand 5V-2A charger or mobile power supply to charge it. Specifications: Color: White/black (optional) Dc: 5V Working Current: 1.8ma Battery Capacity: 100mAh Output Sound Frequency: 13khz-75khz Type of Battery: Lithium Polymer Battery Charging Method: USB Charging (support fast charging) Package Includes: 1x Electronic Mosquito Repellent 1x Manual 1x Hanging Buckle 1x Charging Cable Warm prompt: 1. As different measuring methods, it will occur 1-3 cm deviation about the items, please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding 3. Only the above package contents, excluding other products.