Portable HiFi FM Stereo Radio

✨ Product Overview

Rediscover the joy of FM radio with a device that bridges generations. This ultra‑portable HiFi stereo radio combines the tactile satisfaction of analog tuning with modern audio engineering. Its precision‑machined aluminum body houses a professional‑grade FM chip and a custom analog sound processor, delivering warm, detailed sound whether you're tuning into your favorite station or using it as a compact headphone amplifier. Small enough to slip into a pocket, it's a nostalgic nod to the past with the performance today's listeners demand.

🎯 Key Features

🎚️ Authentic Analog PVR Tuning – The meticulously designed aluminum alloy dial simulates classic PVR tuning, providing immediate tactile feedback that digital tuners simply can't match. Each turn of the knob brings a sense of connection to the music.

📡 Professional FM Reception – Powered by the Silicon Labs Si4831 professional FM radio chip, it delivers clear, stable reception across a wide frequency range. Supports 64‑108MHz, covering standard FM, Japanese bands, and campus radio broadcasts.

🔊 Custom BASS+3D Sound Effects – Equipped with a custom DDB analog sound effect and amplification chip, it recreates classic audio with two‑stage Magic Bass modes. The 3D surround effect adds spatial depth, making every listening session truly immersive.

🎧 Dual‑Function as Headphone Amp – Connect the included digital‑to‑analog conversion cable to transform the RR11 into a compact headphone amplifier. Boosts output power for premium headphones, making it a versatile audio companion for your smartphone or laptop.

📶 Enhanced Signal Reception – Features a dual‑antenna design: headphones act as an antenna alongside a high‑performance PCB signal gain antenna. This significantly improves reception, allowing you to capture clear signals even in challenging environments.

⚡ Ultra‑Compact & Lightweight – With a 13mm ultra‑thin profile and weighing just 46g, it's comparable in size to a conventional lighter. The aluminum alloy body is both durable and elegant.

🔋 Long Battery Life – Built‑in 300mAh lithium battery provides over 8.5 hours of FM playback and up to 17.5 hours in amplifier mode. Convenient Type‑C charging.

📐 Specifications

• Dimensions: Approx. 83.2mm × 39.4mm × 13mm

• Weight: Approx. 46g

• Material: Aluminum alloy body

• FM Frequency Range: 64‑108MHz (FM1: 87‑108MHz, FM2: 76‑90MHz, FM3: 64‑87MHz)

• FM Chip: Silicon Labs Si4831

• Sound Chip: Custom DDB analog sound effect and amplification chip

• Adaptive Impedance: 8‑100Ω

• Headphone Output: Standard 3.5mm port

• Charging Port: Type‑C USB

• Battery: 300mAh lithium battery

• FM Mode Battery Life: ≥8.5 hours

• AMP Mode Battery Life: ≥17.5 hours

• Charging Time: Approx. 2 hours

• FM Mode THD+N: <0.3%

• FM Mode SNR: ≥45dB (A‑weighted)

• AMP Mode SNR: ≥100dB (A‑weighted)

• AMP Mode Output Power: ≥40mW+40mW (32Ω, THD+N<1%)

• Frequency Response: 20Hz‑95kHz (attenuation <3dB)

• Status Indicators: Stereo indicator, frequency pointer, radio indicator, battery level

📦 What's in the Box

• 1x Portable FM Radio Receiver

• 1x Retro‑Style Custom Earphones (serve as antenna)

• 1x Digital‑to‑Analog Conversion Cable (for AMP mode)

• 1x USB Type‑C to Type‑C DAC Adapter Cable

• 1x User Manual