Seeeduino Stalker v3 is an Arduino compatible main board which has various functions. It's an X-Bee carrier board while using with X-Bee modules, such as GPS Bee, Bluetooth Bee and Wifi Bee, etc. It's a charger for Lipo while plugging a solar panel onto the board. Also, you can get time from the inside RTC chip, and all data can be easily stored through the SD card. In a word, Seeeduino Stalker v3 has an independent ecological system and it's good for applications in outdoor environment.
Please note that The IO Ports work in 0~3.3v level only.