Check the listing for details. Yamaha Skd2 Survival Kit for Portable Keyboards. Color: Black, Condition: New. Listed at 9.99 USD. The Yamaha Sk B2 Survival Kit is designed specifically for portable keyboards, particularly the Yamaha Sk B2 model. This kit includes essential accessories such as power supplies, a pedal, and head phones, all neatly packaged in a compact box. It ensures that keyboard players have all the necessary components to perform and practice wherever they go, providing a convenient solution for Yamaha keyboard enthusiasts.