Contains everything you need to make using your Yamaha portable keyboard just that much more enjoyable. Every box contains a power adapter, a foot switch (except for SK C2 - not required) and headphones. Plus, you also receive a two-year extended warranty and over $200 of rebate offers on great Yamaha instruments and accessories.. The SKB2 Survival Kit works with the following Yamaha products: - PSR-101 - PSR-102 - PSR-103 - PSR-201 - PSR-202 - PSR-203 - PSRE-213 - PSR-E223 - PSR-E233 - PSR-E243 - PSRE-313 - PSR-E323 - PSR-E333 - PSR-E343 - PSR-E413 - PSR-E423 - PSR-E443 - NP11 Piaggero - EZ-200 - EZ-220 - DD45 (digital drums)