| Body | Aluminium alloy | Acrylic | |
Ports | USB/Antenna/Optical/Coaxial/RCA | USB/Antenna/Optical/Coaxial/RCA | |
| Mode switch | 3 working modes (RX/TX/DAC) | 3 working modes (RX/TX/DAC) | |
| Input selection | built-in buttons | adjust on APP | |
| Format selection | adjust on APP + built-in buttons | adjust on APP | |
| PAIR key | 2 | 1 | |
| Sound quality mode selection | Double click the button to switch LL/HD | / | |
| Connection indicator | 2 | 1 | |
| Encoding format indicator | RGB | RGB | |
| Input status indicator | USB/COX/OPT 3 indicators | / | |
Bypass | Bypass indicator | / | |
DAC | ES9038Q2M | AK4490 | |
USB | XMOS XUF208 | CSR8675 | |
DSP | CT7302EL | CT5302SN | |
| PCM supports | USB IN | Up to 384kHz/32bit | 48kHz/16bit |
SPDIF IN | Coaxial: up to 384kHz/24bit; Optical fiber: up to 96kHz/24bit | Coaxial: up to 192kHz/24bit; Optical fiber: up to 96kHz/24bit" | |
SPDIF OUT | Coaxial: up to 384kHz/24bit; Optical fiber: up to 192kHz/24bit | Up to 192kHz/24bit | |
| dsd supports | SPDIF IN | DoP64/DoP128 | DSD64(DoP) |
UAC IN-Line OUT | DSD64/128/256(DoP); DSD512(Native) | / | |
UAC IN-SPDIF OUT | DSD64/128(DoP) | / | |
| Bluetooth format supports | RX | SBC/AAC/aptX/aptX HD/LDAC | SBC/AAC/aptX/aptX HD/LDAC |
TX | USB IN:SBC/aptX/aptX HD/aptX LL/LDAC SPDIF IN:SBC/aptX/aptX HD/aptX LL/LDAC | USB IN：SBC/aptX/aptX HD/aptX LL SPDIF IN：SBC/aptX/aptX HD/aptX LL/LDAC | |
USB Audio Mode | UAC1.0（adjust on APP）/UAC2.0 | UAC1.0 | |
Bypass | DAC mode: supports optical input bypass to optical output | / | |
| Maximum output amplitude (THD＜1%) | 3Vrms（10KΩ） | 3Vrms（10KΩ） | |
| Noise floor | ≤3.8uV（ A计权） | ≤4.6uV（ A计权） | |
| SNR (dbA) | ≥118dB | ≥115dB | |
| THD+N | 0.0008%(USB DAC 1kHz) | ＜0.002%(USB DAC 1kHz) | |
| SINAD | 102dB(USB IN） | 94dB(USB IN） | |
| DNR | 112dB(USB IN） | 98dB(USB IN） | |
| Size | about 120x55x25.8mm | about 120x55x23.5mm | |
| Weight | 145g | 115g | |
| Number of Outputs | 4 |
| Input Connection | USB- IN |
| Input Connection | OPT IN |
| Input Connection | Coaxial In |
| Color | Black |
| Audio Outputs | Optical |
| Audio Outputs | Coaxial |
| Audio Outputs | USB |
| Brand | Fiio |
| UPC | 6953175710226 |
| Custom Bundle | No |
| MPN | BTA30 PRO |
| Manufacturer Warranty | 1 year |
| Country/Region of Manufacture | China |
| Model | BTA30 PRO |
| Type | Bluetooth Transmitter |
| Audio Inputs | Optical |
| Audio Inputs | Coaxial |