Power supply voltage: 110V / 60HZ? Air flow: 172 m3 / h? Overall size: length 20cm / width 20cm / height 40cm Description: 1. Small size, low noise and high suction power. Dust removal for dental laboratories. Can work continuously for 4 hours. Can be used in conjunction with sandblasting machine, lathe, grinder and workstation. Packing including: 1 machine 1 Power cord.