IONShield pendant-type ion generator provides clean air anywhere. - Brand: Prife - Model Name: IONShield - Accessories: Instruction manual, cleaning tool, chain - Functions: Ion generator, air purification - Design: Pendant type, silver color Negative ions effectively decompose harmful substances such as PM2.5 and secondhand smoke, kill Staphylococcus aureus, bacteria, and viruses, and alleviate allergy symptoms. The IONShield emits 60 million negative ions. *Negative ions are also called the vitamins of the air. When the negative ion concentration reaches 10,000/cm3 or more, it can enhance the body's natural healing power. ◆Product Specifications Size: Width 37mm x Height 37mm x Thickness 8mm Weight: 11.2g Charging time: 90 minutes (usable for 9 hours) Quick charging time: 40 minutes (usable for 8 hours) Voltage: DC5V My father bought several, and this one has only been charged and never used. It's very easy to use. It sterilizes and disinfects with the ion effect, and enhances natural healing power. Thank you for viewing.