The box contains the FiiO RR11 radio, a white USB charging cable, a black USB-C cable with a digital-to-digital converter for using the amplifier with a digital music source, and a set of headphones with three pairs of tips.
Frequency Modulation (FM) – FM1: 87~108MHz (standard frequency), FM2: 76~90MHz (Japanese frequency band), FM3: 64~87MHz (school frequency band)
FM radio chip – Silicon Labs Si4831
Indicators – Stereo indicator, frequency indicator, radio indicator, battery level indicator
USB port - Type-C USB
Headphone jack – 3.5 mm jack
Battery – 300 mAh for 8 hours of operation
Charging time – 2 hours on a 5V charger (do not use fast chargers)