| Model |
BTR17 |
BTR7 |
BTR15 |
BTR13 |
| Bluetooth version |
5.4 |
5.1 |
5.1 |
5.1 |
| Bluetooth chip |
QCC5181 |
QCC5124 |
QCC5125 |
QCC5125 |
| Independent DAC |
ES9069x2 |
ES9219C×2 |
ES9219MQ×2 |
CS43131 x 2 |
| Independent amp |
THX AAA 78+ x2 |
THX AAA 28 x2 |
| USB DAC chip |
Xmos Xu316 |
Xmos Xuf208 |
Xmos Xu316 |
Built-in with QCC5125 |
| Supported Bluetooth codec |
SBC, AAC, aptX, aptX HD, aptX Adaptive, aptX Lossless, LDAC |
SBC, AAC, aptX, aptX Low Latency, aptX HD, aptX Adaptive, LDAC |
SBC, AAC, aptX, aptX Low Latency, aptX HD, aptX Adaptive, LDAC |
SBC, AAC, aptX, aptX Low Latency, aptX HD, aptX Adaptive, LDAC |
| USB DAC sampling rate |
768k/32bit
DSD 512 |
384k/32bit
DSD 256 |
384k/32bit
DSD 256 |
96K/24bit |
| Status indication&Display |
1.3-inch IPS color display, indicates battery level, volume, audio codec settings menu |
1.3-inch IPS color display, indicates battery level, volume, audio codec settings menu |
0.96-inch OLED, indicates battery level, volume, audio codec settings menu |
0.96-inch IPS color display, indicates battery level, volume, audio codec settings menu |
| Appearance |
Raw leather back cover+Aluminum alloy body |
Glass back cover+Aluminum alloy body |
Hot bending glass+Aluminum alloy body |
PC+Glass front cover |
| Phone decoding (USB dongle) |
3-position switch of Bluetooth/Computer/Phone decoding |
Supported (Automatic detection of USB insertion, one-key entry) |
3-position switch of Bluetooth/Computer/Phone decoding |
3-position switch of Bluetooth/Computer/Phone decoding |
| Desktop mode |
Supported |
/ |
/ |
/ |
| Driver-free mode (switch mode) |
Supported |
Supported |
Supported |
Supported |
| APP control |
Supported |
Supported |
Supported |
Supported |
| HF (hands free)/Microphone |
Supported |
Supported |
Supported |
Supported |
| In-line control headphones |
CTIA mic and in-line control |
CTIA mic and in-line control |
/ |
CTIA mic and in-line control |
| Volume adjustment |
Independent adjustment of 60 levels |
Independent adjustment of 60 levels |
Independent adjustment of 60 levels |
Independent adjustment of 60 levels |
| MQA |
Supported |
Supported |
Supported |
/ |
| Wireless charging |
/ |
Supported |
/ |
/ |
| BAL headphone output power@16Ω |
480mW |
235mW |
270mW |
140mW |
| BAL headphone output power@32Ω |
650mW |
320mW |
340mW |
220mW |
| BAL headphone output power@300Ω |
125mW |
40mW |
50mW |
/ |
| 3.5mm headphone output power@16Ω |
330mW |
160mW |
165mW |
120mW |
| 3.5mm headphone output power@32Ω |
280mW |
165mW |
125mW |
100mW |
| 3.5mm headphone output power@300Ω |
30mW |
18mW |
15mW |
/ |
| Noise (uV) |
PO≤3uV (A-weighted)
BAL≤2.2uV (A-weighted) |
PO≤3uV (A-weighted)
BAL≤5.5uV (A-weighted) |
PO≤2uV (A-weighted)
BAL≤2.7uV (A-weighted) |
PO≤1uV (A-weighted)
BAL≤1uV (A-weighted) |
| THD+N (A-weighted) |
126dB |
118dB |
122dB |
128dB |
| USB port |
Type-C |
Type-C |
Type-C |
Type-C |
| Battery capacity |
1200mAh |
880mAh |
550mAh |
460mAh |
| Battery (AAC codec) |
BAL: 8h
PO: 9h |
9h |
8h |
PO about 9h, BAL about 8h |
| Charging time |
2h |
1.5h |
2h |
1.5h |
| Dimensions |
86.6x41.2x16.3mm |
83.6×39.6×14.2mm |
72.2x32.0x12.5mm (without back clip) |
About 63.2x30x18.8mm (with back clip) |
| Wearing |
Leatherette case with back clip |
Leatherette case |
Back clip+Lanyard |
Back clip+Lanyard |
| Weight |
73.4g |
68g |
37.3g |
About 28.6g |
