nRF51802 Multiprotocol Bluetooth® low energy/2.4 .
nRF51802 - Multiprotocol Bluetooth low energy/2.4GHz RF SOC
nRF51802 Multiprotocol Bluetooth® low energy/2.4 GHz RF System on Chip Product Specification v1.2 Key Features Applications • 2.4 GHz transceiver .