Controlling MCU power supply: 6.5~12 V or 3.5~5.5V. (USB can be used to power the chip on servos board. And it can be chosen automatically. With the USB reverse protection, it can protect your computer from been hurted by the reverse USB.)
Servos power supply: DC (depends on the motors, generally 5V DC).
Control channels: 32. (can be controlled at the same time and the accuracy can be adjusted).
Communication Input: USB or UART (TTL or USART). (The Bluetooth or some other wireless module can be used to make the controlling).