VAD600 Non Isolated Frequency as Mains Input 2.5Amps, 240Volts £ 495.00 VAI600 Isolated Adjustable Frequency 2.5Amps, 240Volts £1195.00 VAD2000 Non Isolated Frequency as Mains Input 8.0Amps, 240Volts £ 695.00 VAI2000 Isolated Adjustable Frequency 8.0Amps, 240Volts £1695.00