The Negima & Hayate Heroine Collection Keyboard was released in Japan in by Movic for ￥10,290. It was promotional merchandise to go along with the movie that was released the same year.
The keyboard is a joint piece of merchandise for the Negima Anime FINAL and Hayate the Combat Butler! Heaven Is a Place on Earth films that were released in 2011. It features various ladies from both series in a variety of outfits.
The cord is approximately 150mm in length and has USB or PS / 2 interface. In includes a USB → PS / 2 conversion connector, keyboard cover, auxiliary seal. It's stated to be compatible with Windows Vista / XP / 2000.