This is a LoRa Node end device that is based on the STM32L151CBU6, which is an ultra low-power MCU based on ARM Cortex M3 Architecture. It also comes with a 433MHz module that is capable of LoRa based communication and a 433MHz antenna!
Wireless Bluetooth Receiver and player stereo dual speaker powered via microUSB or Lipo battery Bluetooth 4.2