In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. This survival kit comes complete with an AC power adaptor, lightweight headphones, and a 2-year extended warranty (standard warranty is 90 days). Essential gear for the DD35, YPR50. Bonus!, also includes a Yamaha CD-ROM containing instructions to connect your Yamaha keyboard to your computer, owners manuals, and a variety of software that teaches you to play and use your new keyboard