Ashtray eliminates secondhand smoke and odors! Revolutionary ashtray uses ionic technology to convert smoke into negative particles that are captured in the dome’s lining. Makes your home more pleasant for non-smoking family and friends! Ultra-quiet; operates with 4 AA batteries (not incl.) or included UL-listed adapter. Has glass ashtray and built-in nightlight. 7 1/2" H x 5 1/2" diam.