Don't gamble with your musical instrument. Use only a genuine Yamaha power adapter. The PA150 adapter replaces the PA5D and is environmentally friendly by reducing the power when the musical instrument is turned off; saving you money! Plug it in and play your instrument without having to worry how long the batteries will last. The PA150 is designed to eliminate your constant need for fresh batteries by using efficient AC operation. Other Features Include: Energy efficient Compact design Specific