Hasbro I-Dog i-Spidey Black 77269 Keep the music playing with this portable pooch that&#8217;s webbed out and plays back music through its built-in speaker or your headphones! SPI-DOG entertains you with electronic lights, movements and sounds based on the music you play. Requires 2 &#8220;AA&#8221; batteries (not included). Includes dual-plug cable. Plus he easily connects to any standard headphone jack with the included dual-plug cable. SPI-DOG works with most portable and non-portable electronic audio devices.