NRF51822 module module ble4.0 development board 2.4G low-power onboard antenna

NRF51822 module  module ble4.0 development board 2.4G low-power onboard antenna
【 One sentence self introduction 】
I am a 4.0 module based on nRF51822, which is small in size, stable and reliable, and can be directly applied in products.
My parameters
Main control chip: nRF51822
Communication distance: 30m (condition: open area/1M speed)
Working frequency band: 2.4GHz
Working voltage: 2.0V~3.6V
Temperature range: -40 ℃~85 ℃
Size: 24.5mm x 32.26mm (PCB)
Interface: All I/O interfaces except for P0.26 and P0.27
Pin spacing: 2.00mm
Distance between two rows of needles: 18.00mm
Antenna: onboard antenna
My application
wearable devices 
 intelligent application
Mobile phone peripherals
RF smart RF tag
Smart household appliances
industrial control 
data acquisition system 
Introduction to nRF51822
NRF51822 is a multi protocol single-chip solution designed for ultra-low power wireless applications (ULP wireless applications).
It integrates Nordic's top-notch wireless transmitters, while supporting  (R) low energy and a dedicated 2.4GHz protocol stack.
The basic situation is:
2.4GHz multi protocol wireless radio frequency
32-bit ARM Cortex M0 processor
128 bit AES hardware encryption processor
256kB flash/32kB RAM
Programmable Peripheral Interface (PPI)
Full functional digital interface: SPI/I2C/UART
10 bit ADC
Programmable output power:+4dBm to -20dBm
Application development and protocol stack are completely independent
Fully compatible with NRF24L series
Compatible with NRF51xxx series pins
Global independent power management
Working voltage range (1.8 V~3.6 V)
[Version update instructions]
Core51822 currently uses the Rev3 version chip, doubling RAM to 32kB, supporting higher versions of SDKs, and all programs are compatible with the original Rev2 version chip