Seeeduino Stalker v2 Seeeduino Stalker is a feature rich Arduino compatible Wireless Sensor Network node. Its modular structure and onboard peripherals makes it convenient to log and time stamp sensor data on a periodic basis. The Seeeduino Stalker is a good candidate for all your tracking, monitoring and control projects. Features Arduino compatible, based on Seeeduino Onboard microcontroller: ATmega328P Onboard Real Time Clock chip with a supercap as a backup power source Serial interface with DTR for auto reset during programming when operating in standalone mode. (For programming, UartSBee must be bought separately) MicroSD card socket I2C Pin header (operation voltage is selectable: 5.0V or 3.3V) User defined switch and LED Bee series socket - 2*10 pin 2.0mm pitch (which will mate with - one at a time - any of the wireless modules: XBee, BluetoothBee, GPSBee or RFBee.) For more detail, please visit: http://www.seeedstudio.com/item_detail.html?p_id=727