| Name/Model | BTR15 |
| Hardware Scheme | DAC: ES9219MQ * 2 ,USB: XMOS XU316, Bluetooth decoding: QCC5125 |
| color | Black/Blue |
| Volume Control Type | entity key |
| Weight | about 37.3g |
| three circumference dimensions | approximately 32.0x72.2x12.5mm |
| MQA Renderer | support |
| mobile phone decoding (small tail mode) | support (set the mode switch to the phone file) |
| Drive-free mode (switch mode) | support |
| Car mode | can follow the car USB automatic switch machine |
| Microphone function | Support Bluetooth voice calls, built-in omnidirectional microphone |
| Channel Balance | <0.2dB |
| gain | L/H |
| FiiO Control | supports APP settings |
| Bluetooth format indication | support |
| Status Indication | display indicates transmission format, charge, power, volume, sample rate, menu |
| Deep Standby | Without any connection, it will automatically enter the power-saving shutdown in 2 minutes, and the time can be set by APP. |
| Bluetooth reception (5.1) | AAC/SBC/aptX/aptX LL/aptX adaptive/aptX HD/LDAC |
| key | power key * 1; Multi-function key * 1; Volume plus and minus key * 1 |
| USB | TYPE C USB2.0 (charging/data transfer) |
| Headphone output | standard 3.5mm socket |
| balanced output | standard 4.4mm socket |
| toggle switch | mode switch * 1 |
| power supply | DC5V 1A |
| Battery Capacity | 550mAh lithium polymer battery |
| charging time | charging time: ≤ 2 hours |
| Audio Input | Bluetooth reception |
| encoding format | AAC |
| Volume | Level 21 |
| gain | high |
