SoC TX power:
-40dB to +8dB
Single power supply:
1.7 ~ 5.5V
Flash and RAM :
512kB Flash and 128KB RAM
Operating Temperature range:
-40 to 105 degree Celsius
Range:
125kbps: up to 250 meters in open space
processor
ARM Cortex -M4 32-bit processor with FPU, 64 MH