Frequency: 2402 to 2480 MHz Output power: +4dBm typ. Single power supply: 1.8 - 3.6V Single Mode Bluetooth® low energy Integrated System/Sleep Clock Integrated high performance ceramic chip antenna ARM Cortex M0 32bit processor and 256KB flash and 32KB RAM Interface: SPI, UART, I2C and 8/9/10bit ADC Outline: 9.6 x 12.9 x 2.0 mm with 1mm pad pitch