BLE Nano
BLE Nano BLE Nano BLE Nano
$18.00

You must have at least one set of BLE Nano Kit because you will need the companion board, MK20 USB board, which is used to load firmware into BLE Nano from a PC.

BLE Nano is the smallest Bluetooth Low Energy System-on-Chip (SoC) development board, only 18.5 x 21mm. You could develop application using Nordic's SDK, mbed.org or our open source Arduino Library for nRF51822.