Features: 100% brand new and high quality The smallest single-chip system module 4 digital display module 8-bit color LED light water USB powered Or external 5V power supply LCD1602 and LCD12864 interface 1 Way buzzer; 1 Way DS18B20 temperature measurement circuit; 1 way infrared interface circuit; 4 independent keys; 1 Way PL2303USB communication circuit Specifications: Board Color:Red Board Size: 9cm*7.6cm Package Includes: 1* 51 AVR MCU Microcontroller Development Board for Arduino