nRF51822 BLE4.0 Bluetooth 2.4 GHz Wireless Module XL51822 Communication BoardFeature:It supports multiple 2.4GHz radio32-bit ARM Cortex M0 processor256kB flash \/ 16kB RAMSoftware stacks available as downloadsApplications and protocol stack completely separate256kB FlashDigital I \/ OFully compatible with nRF24L-seriesProgrammable output power from + 4dBm to -20dBmRSSI16kB RAMFlexible configurable 31 pin GPIOSimple ON \/ OFF global power managementFull-featured digital interface: SPI \/ 2-wire \/ UART10-bit ADC128-bit AES ECB \/ CCM \/ AAR co-processorUltra low-power 32kHz crystal and RC oscillatorsWide supply voltage: 1.8V - 3.6VOn-chip DC \/ DC buck converterApplication:Bluetooth Smart applicationsMobile phone accessoriesComputer peripheralsCE remote controls for TV、 STB and media systemsProximity and security alert tagsSports- and fitness sensorsHealthcare and lifestyle sensorsGame controllers for computersToys and Electronic gamesDomestic\/Industrial control and data-acquisitionSmart RF tags for tracking and social interactionAudience response systemIntelligent domestic appliancesPackage included:1 x nRF51822 module