UV-C radiation sterilization method. LED indicator for convenient usage. Germicidal UV light eliminates germs and bacteria. Voice notification alert while starting and finishing the UV Sterilization process. Useful for: phone, toothbrush, makeup tools, jewellery, currency and appliances used at home, office and travel. Plug it into the USB port on PC, power bank or USB charger and ready for sterilization. Designed to fit a variety of phone sizes. The case is compatible with Cell phones up to 6.6 inches. Put essential oil (not included) on the aromatherapy inlet, press aromatherapy switch to start having aroma humidifier for your device. Simple to operate with two buttons.