There are also 60 "mini-apps" available, including a music player and some games.
Full spec list:
Dimensions: 1.42 X 1.42 X 0.3 in
Weight: 0.55 oz
Display: 1.3" OLED display, 128 x 128 pixels
Compatibility: BluetoothTM 3.0 and AndroidTM 2.1 or above Connectivity: Standard USB charging
Battery life: Up to 4 days
Language support for: English, Spanish, French, Chinese (Traditional), Portuguese, Swedish, Russian, Danish, Polish, Japanese, Czech, German, Modern Greek, Dutch
Notifications: Display notification or vibration
Apps: All events (displays in chronological order), Messaging (SMS/MMS), corporate E-mail (for SonyTM and Sony Ericsson Android phones), Gmail (for all other Android smartphones) Calendar Notifications, FacebookTM, TwitterTM, Music Player, Call handling (call, mute, reject, or answer and send pre-defined SMS), Pre-defined SMS, e.g. missed calls – I'm busy, messaging - call me, email – ok, Battery strength, Find phone, and Weather widget. Plus lots of apps on AndroidTM market.
The device will have to compete with newcomer "Pebble" which set the record for Kickstarter funding at over $10 million.