The ashtray adopts a natural air suction structure, and the smoke is exhausted by the suction formed by aerodynamics, effectively absorbing and filtering the smoke quickly. In terms of battery life, the common AA battery on the market is used, which can be removed and replaced at any time. Two No. 5 batteries can work about 40 times, 5.2 minutes each time. The built-in card slot for aromatherapy tablets can also be replaced with aromatherapy tablets of different flavors at will. With the exhaust air, the smell of aromatherapy is distributed more evenly. See the manual for details on the location of the card slot. The built-in filter cotton is a filter cotton with negative ion release In order to prolong the battery life and avoid forgetting to turn it off, this ashtray purifier has added a smart solution, which will automatically turn off after 5.2 minutes of use with one button. Product accessories: filter cotton*1, aromatherapy tablet*1 (random taste) material: plastic Size: 13*13*7cm