In addition to standalone playback, ECHO NANO supports UAC (USB Audio Class) mode, transforming into a high-performance external USB sound card when connected to a smartphone, tablet or computer via a USB cable. The built-in CS43131 DAC chip processes audio directly, dramatically improving the listening quality of any connected device without installing drivers – plug and play. In UAC mode, charging can optionally be disabled to eliminate battery concerns on the connected phone. CTIA in-line controls (play/pause, skip tracks, volume) are also supported via compatible headphone cables, adding convenient hands-free control in mobile scenarios. Storage is expandable via micro-SD card up to 256GB, allowing you to store thousands of songs in your library.
Detailed specifications:
DAC chip: CS43131
Display: 0.91-inch OLED color display
Supported playback formats: DSD, WAV, FLAC, APE, MP3, M4A, OGG
Maximum sampling rate (playback): DSD64/128/256 | PCM 24bit/192kHz (WAV, FLAC, APE)
USB DAC sampling rate: PCM 16bit/48kHz
Output: 3.5 mm single-ended
Output power: ≥120mW+120mW @ 32Ω (THD+N <1%)
SNR: ≥127dB (A-weighted, 32Ω)
THD+N 0.0006%
Noise margin 0.7μV
UAC mode Yes - USB sound card (plug-and-play, option to disable charging)
Built-in controls Yes – CTIA standard (play/pause, skip track, volume)
Micro-SD card storage (up to 256GB)
Control: Metal multi-function scroll wheel (power, volume, screen on/off)
Case material: Series 6 aluminum-magnesium alloy, precision CNC-carved
Dimensions: 81 x 20 x 11 mm
Weight: ~33.5 g
Box contents: ECHO NANO Black x1, USB cable x1, quick start guide x1








