The UNO is an Arduino compatible board.
It is based on Arduino UNO Rev3 design. Some visible improvement on hardware make more flexible and easier to use.
SPI, COM and IIC bus breakout make bus connect easier.
The Arduino Uno Rev3 is a microcontroller board based on the ATmega328 (datasheet).
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.
It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

The Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Uno R3 works with all existing shields but can adapt to new shields which use these additional pins.
Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP).
The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).

Nano Micro Shield V3.0 I/O(Nano Expansion Board Micro Sensor Shield v3.0 I/O For Uno R3 leonardo Arduino)
This is a dedicated arduino I / O expansion boards designed for leads, you can easily use DuPont wire connecting various modules, compatible with arduino 2009, NANO, UNO, LEONARDO, MICRO, when you use a power extension board, the maximum current output can reach 5V/2A. We use colored pin, easier wiring area definitions, Red 5V, black GND, yellow I / O.

40PCS Dupont Wire 2.54mm 20cm Female to Female Jumper Cable(1P To 1P)
1.Brand new and high quality.
2.40P color dupont line
3.length ： 20cm
4.1p-1p pin header
5.a row of 40 root
6.Compatible with 2.54mm spacing pin headers

30CM USB A Male to Type B Plug Cable For Computer/Printer/Fax Lead 2.0 Blue
100% Brand New.
USB A Male to Type B Plug cable.
Connector Type: Standard USB jack
Wire: flexible PVC jacket, flexible and easy to break, durable
Advantages: with magnetic ring, anti-jamming performance
Product advantages:
1. Standard 2.0 connector provides excellent electrical conductivity, making high-speed transmission of data is fast and accurate interface with Baotou design, is conducive to Protect the USB interface, durable
2. Core all high-quality tinned oxygen-free copper, increase the signal transmission surface, anti-oxidation, life is higher than the average product 50 times
3. Wire with aluminum foil, braid double shield, anti-interference ability, signal transmission more stable
4. Using a unique signal line twisted way, increase the signal transmission stability
Product use:
printer cable is a USB male head, used to connect the computer's USB interface; the other end is the mouth of the mouth, for connecting USB printer

Package included:

37 sensors:
- 1 x Small passive buzzer module KY-006
- 1 x 2-color LED module KY-011
- 1 x Hit sensor module KY-031
- 1 x Vibration switch module KY-002
- 1 x Photo resistor module KY-018
- 1 x Key switch module KY-004
- 1 x Tilt switch module KY-020
- 1 x 3-color full-color LED SMD modules KY-009
- 1 x Infrared emission sensor module KY-005
- 1 x 3-color LED module KY-016
- 1 x Mercury open optical module KY-017
- 1 x Yin Yi 2-color LED module 3MM KY-029
- 1 x Active buzzer module KY-012
- 1 x Temperature sensor module KY-013
- 1 x Automatic flashing colorful LED module KY-034
- 1 x Mini magnetic reed modules KY-021
- 1 x Hall magnetic sensor module KY-003
- 1 x Infrared sensor receiver module KY-022
- 1 x Class Bihor magnetic sensor KY-035
- 1 x Magic light cup module KY-027
- 1 x Rotary encoder module KY-040
- 1 x Optical broken module KY-010
- 1 x Detect the heartbeat module KY-039
- 1 x Reed module KY-025
- 1 x Obstacle avoidance sensor module KY-032
- 1 x Hunt sensor module KY-033
- 1 x Microphone sound sensor module KY-038
- 1 x Laser sensor module KY-008
- 1 x 5V relay module KY-019
- 1 x Temperature sensor module KY-001
- 1 x Temperature sensor module KY-028
- 1 x Linear magnetic Hall sensors KY-024
- 1 x Flame sensor module KY-026
- 1 x Sensitive microphone sensor module KY-037
- 1 x Temperature and humidity sensor module KY-015
- 1 x XY-axis joystick module KY-023
- 1 x Metal touch sensor module KY-036

1*UNO R3 PLUS(UNO R3 PLUS Sensor I/O Shield Atmega328P 16U2 Expansion Board)