2. What are the hardware specifications, dimensions, and power specifications of the RR13?

RR13 hardware specifications

Radio chip: Si4831

Main controller chip: MS430F2121

Analog audio and amplifier chip: Customized FIIO DDB chip

RR13 dimensions

Dimensions: about 43.4*85.6*16.4mm

Weight: about 76g

RR13 power and sensitivity

Speaker radio sensitivity: 20dBU

Headphone radio sensitivity: 15dBU

Radio output power (speaker/headphone): 800mW(8Ω)/5mW(32Ω)

AMP output power (speaker/headphone): 750mW(8Ω)/80mW(32Ω)