The Leonardo plus is an Arduino compatible board. It is a microcontroller board based on the ATmega32U4
Some visible improvement on hardware make more flexible and easier to use. SPI, COM and IIC bus breakout make bus connect easier.
It has 20 digital input/output pins (7 of them can be used as PWM outputs and 12 are used as analog inputs), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP plug and a reset button.
It contains everything needed to support the microcontroller; simply use a USB cable or battery to connect it to your computer to get started. in addition to the virtual (CDC) serial/COM port, Micro can also be displayed as a mouse and keyboard on a connected computer.
The leonardo plus has an increased pin header spacing of 2.54mm and leads to all I/Os and VCC/GND. you can easily connect by DuPont wire with other applications.