This is an open Smart outlet designed by CuteDigi for Arduino.
You can control the embedded triac by toggling D9 of Arduino. You can also do dimmer. A 16X2 LCD is provided so that you can use it to show the status.
Two buttons are provided to interact with Arduino.
You can sense the current too!
Together with the Xbee shield or WiFi shield, remote control and sensing of smart outlet can be achieved.
Datasheet of current sensor used (ACS712)