| Name/Model | BTR13 |
| Hardware solution | DAC: CS43131*2, USB/Bluetooth decoding: QCC5125 |
| Color | Black/Blue |
| Volume control | Physical button |
| Weight | About 28.6g |
| Dimensions | About 63.2x30x18.8mm |
| Driver-free mode (switch mode) | Supported |
| Phone decoding (USB dongle) | Supported (switch the Mode Switch to PHONE) |
| Microphone | Supports Bluetooth voice call, built-in omnidirectional microphone |
| In-vehicle mode | Auto on/off following the USB of the vehicle |
| Gain | L/H |
| Channel balance | ＜0.2dB |
| Deep standby | Auto-enters power saving mode if no connection in 3 minutes, and the time can be set in the app. |
| FiiO Control | Supports settings in the app |
| Bluetooth codec indication | Blue: SBC; Cyan: AAC; Purple: aptX/aptX LL; Yellow: aptX HD; White: LDAC; Green: aptX adaptive |
| Status indication | The display indicates transmission codec, charging status, battery level, volume, sampling rate, EQ, and menu |
| Display | 0.96-inch TFT (80*160) bezel-less display |
| Bluetooth reception (5.1) | AAC/SBC/aptX/aptX LL/aptX Adaptive/aptX HD/LDAC |
| Physical button | Power button*1; Multifunction button*1; Volume up/down button*1 |
| USB | TYPE-C USB (Charging/Data transmission) |
| Headphone output | Standard 3.5mm plug |
| Balanced headphone output | Standard 4.4mm plug |
| Trigger switch | Mode switch*1 |
| Power supply | DC 5V /1A |
| Battery capacity | 460mAh lithium polymer battery |
| Charging time | ≤2 hours |
| Audio input | Bluetooth reception |
| Bluetooth codec | AAC |
| Volume | 22 levels |
| Gain | High |
