Yamaha PSR-E473 Digital keyboard Used only once. Almost brand new 100% new condition Reason of sale: Friend bought it new but had to leave the country. Requires 6 AA size alkaline(LR6), manganese(R6) or Ni-MH rechargeable (HR6) batteries. Batteries: not included Requires AC adaptor (PA-150 or an equivalent recommended by Yamaha). AC adapter: not included.