This article needs attention from an expert on the subject.(May 2009)
Rolly is an egg-shaped digital robotic music player made by Sony, combining music functions with robotic dancing. It has two wheels that allow it to rotate and spin, as well as two bands of colored LED light running around its edge and cup-like "wings" (or "arms" according to the Sony sonystyle USA website) which can open and close on either end, all of which can be synchronized to the music being played.
Sony Rolly on display at a trade show in Japan.
Rolly has several operating modes, including Bluetooth functionality. Rolly can play music streamed directly from any Bluetooth-enabled cell phone, computer, or mp3 player. Rolly is able to dance along to streaming music, but the Rolly Choreographer software produces far better results when it analyzes tracks and creates motion files before loading them onto Rolly. The Rolly player uses .mtf files to store motion data along with a particular music track. Pre-made motion files can be downloaded and uploaded from Rolly Go.
Rolly also has a G force sensor (accelerometer) which detects if the player is laying horizontally or being held upright. When held upright, the track next/previous can be controlled by the top wheel and volume up/down can be controlled by the bottom wheel. Tracks can be shuffled by holding the unit upright, pressing the button once, then shaking the unit up and down (light color changes to purple). You can return to continuous play (light color blue) by simply repeating this process.
On August 20, 2007, Sony launched an initial teaser advertising campaign for the product. The product was unveiled on September 20, 2007, and went on sale in Japan on September 29, and was for sale at the Sony sonystyle USA website for $229.99 USD, down from $399.99 USD. It is available in black and white. Sony offers the "Engrave it." option for this item, and a number of accessories, including "arms" in different colors.
The Rolly itself is currently[when?] out-of-stock in some countries, and all accessories are listed as "clearance".[This quote needs a citation] According to a Sony Style assistant,[who?] the Rolly has been discontinued in the US.[This quote needs a citation] Sonystyle.com confirms this, as well as Sony's UK online store  In some countries it is still on sale on Sony website.
- "Tokyo Thrift: the Sony Rolly was peak Sony". The Verge. Retrieved 2017-09-15.
- thewest.com.au, Sony unveils new twisting music player
- Sony launches Rolly teaser campaign - makes girls chicken dance - Engadget
- SEP-30BTWHI | Rolly Sound Entertainment Player - White | Sony | SonyStyle USA
- Sony UK