It can take the Lemon DSM2 receiver mounted on pins, has a 5V 1.5A low dropout BEC, 4A on each of the two drive channels, both 5v and full bat out on the servo connector, power switch and built in mixing on a 21 x 29 mm board.
The 7 pin connector on the left is from top to bottom Bat +, Bat -, Mot 1a, Mot 1b, Mot 2a, Mot 2b and bind.
The 4 pin servo connector on the right is Bat+, Sig, 5V, Bat -.
It is rated for 2S or 3S operation.