3-in-1 Design: Not just an ashtray, but also an air purifier and aromatherapy machine. Features 4 small grooves for diffuser tablet placement, refreshing your room by removing formaldehyde, odors, dust, and smoke. Easy to Clean: Detachable design allows for easy cleaning. Simply rinse the lining with water when covered with soot. The built-in filter sponge is washable and replaceable (needs to be dried). High Performance Filtration System: 360-degree rotatable design filters out smoke, dust, and odors using flame retardant activated carbon fiber filter cotton. Negative ion generator further purifies the air, providing fresh air in small spaces. Choose from 2 speed options. Simple Operation and Portability: One-button operation for convenience. Up to 3-4 hours of running time. Easily charge from a laptop, power bank, or any 5V USB port. Suitable for bedrooms, offices, hotel lobbies, and cars. Healthier Indoor Environment: Reduce smoke and odors, protecting the respiratory health of your family, co-workers, and loved ones. Perfect for home, office, balcony, garden, living room, bar, car, hotel, coffee shop, and more. -Color: black. -Material: ABS, resin. -Size: about 13.6x9 cm/5.35x3.54 inch. -Rated input: DC5V1A. -USB: TYPE-C charging port. -Rated power: 5W. -Battery capacity: 2000mAH. -Negative ion concentration: 10-15 million/. Package Including:1x Smokeless Ashtray 1x USB 1x Filter cotton