PMD ESC Fuel tank

[WillsIH]

Alright fellas I was hoping someone could help me out with this. I love the idea of using the normally wasted fuel tank for the board location but Im not very tech savy and dont quite understand whats all included as far as function goes here.
http://www.gardentrucking.com/detail...d#.Vueg6EVOLCQ
I dont know what BEC means, if someone could enlighten me please? And if the "full power forward and reverse" means it doesnt have the graduated speed at part throttle or it just means I get the same power/speed in forward as i do reverse?

Thank you for the help