We offer three small blowers complete with intake assembly and output connections. These produce a considerable volume of air (CFM) but less pressure (psi). Therefore, they limited with regards to delivery at depths beyond 50″ but produce high volumes of air for many air outlets. Both can be operated on both 115V/ 230V, 50 or 60 Hz cycles. Output at 50 Hz of both pressure and volume will be reduced by about 30%. UL, CE and CSA approved. Operate at low noise levels. Automatic thermal overload switch protects motor against damage. Will automatically restart when motor cools. Have 3 year limited warranty. Great for larger ponds or a large number of tanks and aquaria.