Bluetooth 4.0 Low Energy – BLE Shield is designed to work with Arduino boards or compatibles, including Arduino Uno, Mega 2560, Leonardo and Due. BLE Shield stands for Bluetooth Low Energy Shield. Bluetooth 4.0 Low Energy – BLE Shield allows you to connect your Arduino boards with other BLE Central device like a smartphone or tablet. So you can control your Arduino pins with your own mobile app, send sensor data from your Arduino to an app for processing, use your mobile device as an internet gateway for your Arduino, etc.
Bluetooth 4.0 Low Energy – BLE Shield could operate under 3.3V or 5V. Therefore it works with a lot of Arduino compatible boards too.
Supported BLE Devices:
Android 4.3 or above (4.4 recommended for stability) with Bluetooth 4.0 hardware support:
Getting Started with BLE Shield: http://redbearlab.com/getting-started-bleshield/
Nordic nRF8001 Product Specification: https://github.com/RedBearLab/nRF8001/
RedBearLab Web Site: http://redbearlab.com/bleshield/