This part is a kind of semiconductor called SX1278.

Function of this product has 137 MHz to 1020 MHz Low Power Long Range Transceiver.

Manufacturers : Semtech Corporation

Image and pinout :

Some of the text within the PDF file :

SX1276/77/78/79 WIRELESS, SENSING & TIMING DATASHEET SX1276/77/78/79 - 137 MHz to 1020 MHz Low Power Long Range Transceiver GENERAL DESCRIPTION The SX1276/77/78/79 transceivers feature the LoRaTM long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption. Using Semtech’s patented LoRaTM modulation technique SX1276/77/78/79 can achieve a sensitivity of over -148dBm using a low cost crystal and bill of materials. The high sensitivity combined with the integrated +20 dBm power amplifier yields industry leading link budget making it optimal for any application requiring range or robustness. LoRaTM also provides significant advantages in both blocking and selectivity over conventional modulation techni [ ... ]

SX1278 PDF Datasheet Download