The nRF51 Dongle is discontinued. Consider the nRF51 DK or the nRF52840 Dongle as an alternative.
The nRF51 Dongle is a low-cost, versatile USB development dongle for Bluetooth® Low Energy, ANT™ and 2.4 GHz proprietary applications using the nRF51 Series SoC. The dongle supports development for nRF51822, nRF51422 and nRF51824 SoCs.
It has a user programmable RGB LED and button, as well as 6 GPIOs available from edge connectors. It comes with a SEGGER J-Link debugger allowing programming and debugging of the on-board SoC. It is powered with USB.
The box contains an nRF51 Dongle.