Specifications：
Onboard chip: NRF51822
Communication distance (open outdoor@1M data rate): 30m
Frequency range: 2.4GHz
Operating voltage: 2.0V ~ 3.6V
Operating temperature: -40℃ ~ 85℃
Dimension (PCB): 24.5mm x 32.26mm
Expansion pinheader: all the I/Os except P0.26 and P0.27
Pinheader pitch: 2.00mm
Spacing between pinheaders on the left side and the right side: 18.00mm
Antenna: onboard antenna

Features:
2.4 GHz multiprotocol RF transceiver
ARM Cortex-M0 32 bit processor
128 bit AES HW encryption
128kB flash & 16Kb RAM
Programmable Peripheral Interconnect (PPI)
Digital interfaces: SPI, I2C, UART
10 bit ADC
Programmable output power: -20 to +4 dBm
Independent application development and protocol stack
Fully compatible with NRF24L series
Pinout compatible with NRF51xxx series
Global separate power management
Operating voltage: 1.8 V ~ 3.6 V
Applications:Wearable devices;Bluetooth intelligent application;
Mobile phone accessories;RFID labels;Smart home appliances;Industry control;Data acquisition system;Revision History;
2015.06, Core51822 upgrades the onboard chip to Rev3, features RAM 16K,
supports higher version SDK, and all the demo codes are still compatible with the Rev2 ones.

Package Included:
2 x NRF51822 CORE51822 2.4GHz BT4.0 Wireless Bluetooth Module