Compared with other versions of rduino, which use an USB-Serial conversion chip, innovatively adopts a single-chip solution.Only one piece of Atmega32u4 is used to realize USB communication and control.Atmega32u4' s original supports USB, and can be simulated as a mouse and keyboard, which greatly improves the application situation. Use of rduino requires a new version of IDE1.01 or above. quality: high quality material, safe and durable.Controller: ATmega32u4Work Catalog: 16 MHzWorking voltage: 5VInput voltage (recommended): 7-12VDigital IO port: 22 (D0-D13, D14-MIS0, D15-, D16-MOSI, D18-23[A0-A5] )PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13)Analog input: 12 (A0-A5, D4-A6, D6-A7, D8-A8, D9-A9, D10-A10, D12-A11)5V digital/analog port allowable current: 40 mA3.3V digital/analog port allowable current: 50 mAFIash Memory: 32 KB (ATmega32u4) of which4 KB used_ by__ | loaderSRAM: 2.5KB (ATmega32u4)EPROM: 1KB (ATmega32u4)Material: PCBcolour: bluePackage Contents:1 x Development BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.