Key actuator specifications and benefits: 1. Reversing motors, thermal overload protection, 30% duty rated long life. 2. Four (4) limit switches for motor control and remote indication of end of travel. 3. Adjustable mechanical travel stops and local visual position indication. 4. 220 v ac, single phase standard. Additional voltages available including: 220 v dc single phase, 12 v dc, 24 v dc, 24 v ac.