Features: 1. The silent mosquito is safe and harmless, suitable for pregnant and baby. The wave emitted by the machine exceeds 5000Hz-9000Hz, which is higher than the upper limit of human ear hearing, and there is no harm to people and pets. 2. Acoustic physical mosquito for 360-degree surround protection. The bracelet mimics the sounds that female mosquitoes hate, such as the sounds of male mosquitoes and dragonflies. To achieve the mosquito effect, in nature, the blood-sucking mosquitoes are all female mosquitoes, and they are all in the pregnancy and egg-laying period. At this stage, the female mosquitoes will avoid the male mosquitoes and avoid secondary conception, so the sound of the male mosquitoes is simulated to achieve the mosquito effect. 3. The hook type is small and portable, suitable for traveling, climbing, fishing, reading, camping, sports, gardening, etc. both indoors and outdoors. 4. 3 gear drive settings, in the standby state, press to turn on the power, the blue indicator light is on, you can use it. 5. Just use it, you will no longer be bitten by mosquitoes. Specification: Material: ABS Size: about 3.5*5.5*1.4cm/1.38*2.17*0.55in Precautions for Product Use: 1. When using the product, it is strictly forbidden to cover the product with clothes. 2. The battery can last for 7 days, hang the product in the backpack or between the waist and the hip. Turn on the power switch to use. Indicator light description: Red light: charging indicator. Connect the charger, the red light flashes to indicate that it is charging, and it will be on after full charge. Blue light: instructions for mosquito work. Press the button, after the display lights up, press the button again to start the mosquito . Work: the blue indicator light is on for 1 second, and then light every 5 seconds Packing List: 1*Keychain Mosquito Only the above packaging content, other products are not included.