Adafruit (PID 3179) Feather M0 RFM95 LoRa Radio - 433MHz<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in</li><li>Light as a (large?) feather - 5.8 grams.</li><li>ATSAMD21G18 @ 48MHz with 3.3V logic/power 256KB of FLASH + 32KB of RAM No EEPROM. You also get tons of pins - 20 GPIO pins Hardware Serial， hardware I2C， hardware SPI support PWM outputs on all pins 6 x 12-bit analog inputs 1 x 10-bit analog ouput (DAC)</li><li>3.3V regulator with 500mA peak current output. Built in 100mA lipoly charger with charging status indicator LED</li><li>USB native support， comes with USB bootloader and serial port debugging</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51ayIGvWu8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61uGoKCmXzL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51WKdZ9HyBL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61CH-4LOMGL.jpg" noproxy>