Wikipedia
Motoactv (styled MOTOACTV) was a smartwatch sold by Motorola which contains a number of hardware features and software applications tailored to fitness training. The watch contains apps for monitoring athletic activity using a built-in accelerometer to measure strides and GPS to measure distance. It can also be synced with a Speed/Cadence Bike Sensor or foot pod via ANT+ technology. The watch can communicate with external devices over Bluetooth 4.0 such as pulse sensor and Bluetooth stereo headphones for music. In addition, there is a DJ mode that will custom tailor the music dynamically to the workout. It was announced on October 18, 2011, and released to the US market on November 6, 2011. The watch was discontinued by Motorola in 2013.
When connected to a phone, the watch will display caller ID, text messages and calendar alerts. Plugins are available for Facebook, Twitter and Weather.
The device reports that it is running Android 2.3.4 which according to Google is the same API as Android 2.3 with some minor patches and bug fixes.
A user (@CMWDOTME) on Twitter discovered that patching the boot kernel and rooting (Android OS) the device along with replacing the main "launcher" app on the MOTOACTV with an Android launcher app from the Market, the MOTOACTV becomes a rather capable watch-sized Android tablet, matching most of the specs of many Android-based phones except for a much reduced size.