I bought it for a while but still need to learn more.
First of all, here is my unboxing video ->
My beagle comes in black with the credit card size (I think it was black credit card )
To start using it, you will need these ..
1. 5V power supply adaptor
2. Ethernet cable to connect the beagle to the internet.
3. micro HDMI cable to connect the beagle to your monitor.
Just connect all cables and turn the power on. you will see Angstrom linux booting.
That is for today. See you later :D