Adafruit Feather nRF52 Bluefruit LE - nRF52832

Key Features: Works out of the box with just about all Adafruit FeatherWings! (Wings that require the UART won't work) Built in over-the-air bootloading capability. Single MCU means better performance, lower overall power consumption, and lower production costs Built in USB Serial converter for fast and efficient programming and debugging The Adafruit Feather nRF52 Bluefruit is another easy-to-use all-in-one Bluetooth Low Energy board, with a native-Bluetooth chip(RF52832) and built in USB and battery charging. The RF52832 has twice the flash, SRAM and performance of the earlier nRF51-based Bluefruit modules. Best of all, it has Arduino IDE support so there is no 'helper' chip like the ATmega32u4. It's got tons of awesome peripherals: plenty of GPIO, analog inputs, PWM, timers, etc. Leaving out the extra microcontroller means the price, complexity and power-usage are all lower/better. Allowing you to run code directly on the chip, straight from the Arduino IDE as you would with any other MCU or Arduino compatible device.Bluetooth Low Energy is the hottest new low-power, 2.4GHz spectrum wireless protocol. It's the only wireless protocol that you can use with iOS without needing special certification - supported by all modern smart phones. Excellent for use in portable projects that will make use of an iOS or Android phone or tablet. It also is supported in Mac OS X and Windows 8+.Item SpecificsARM Cortex M4F (with HW floating point acceleration) running at 64MHz512KB flash and 64KB SRAMBLE compatible 2.4GHz radioUp to +4dBm output power1.7v to 3.3v with internal linear and DC/DC voltage regulators19 GPIO, 8 x 12-bit ADC pins, up to 12 PWM outputsPower/enable pin4 mounting holesReset buttonOptional SWD connector for debuggingSize: 2" x 0.9" x 0.28"Weight: 5.2gLipoly battery and MicroUSB cable not included