| The Comparison Table for Bluetooth Amplifiers |
| Model |
BTR3 |
BTR1 |
BTR1K |
μBTR |
| Volume Adjustment |
Independent adjustment separating from phone's volume |
Independent adjustment for some phones but simultaneously for iPhone and some other phones |
Independent adjustment separating from phone's volume |
Independent adjustment separating from phone's volume |
| Supported Audio Formats |
SBC, AAC, aptX, aptX LL, aptX HD, LDAC and LHDC |
SBC, AAC, aptX and aptX LL |
SBC, AAC, aptX and aptX LL |
SBC, AAC and aptX |
| Bluetooth Profile |
HFP, HSP, A2DP and AVRCP |
HFP, HSP, A2DP and AVRCP |
HFP, HSP, A2DP and AVRCP |
HFP, HSP, A2DP and AVRCP |
| Bluetooth Chip |
CSR8675 |
CSRA64215 |
QCC3005 |
CSR8645 |
| DAC Chip |
AK4376A |
AK4376A |
AK4376A |
/ |
| Amp Chip |
TPA6132A2 |
| USB DAC |
√ |
/ |
√ |
/ |
| Dedicated Pairing Button |
√ |
/ |
√ |
/ |
| Dedicated Volume Button |
√ |
√ |
√ |
√ |
| Transmission Distance (at open area) |
About 10m / LDAC (4m at SQ first) |
About 10m |
About 10m |
About 10m |
| Status Indicator Light |
RGB light indicates the input Bluetooth audio codec, charging and working status |
LED light indicates sound effect, charging and working status |
SBC: Blue light flashing
AAC: Cyan light flashing
aptX/aptX LL: Purple light flashing
USB DAC: White light flashing |
LED light indicates charging and working status |
| Hands-free Call / Mic |
√ |
√ |
√ |
√ |
| Call up Siri in iOS |
√ |
/ |
√ |
√ |
| NFC |
√ |
/ |
√ |
√ |
| Headphone Output |
3.5mm stereo jack |
3.5mm stereo jack |
3.5mm stereo jack |
3.5mm stereo jack |
| USB Port |
Type C |
Micro USB |
Type C |
Type C |
| Battery Capacity |
300mAh |
205mAh |
205mAh |
120mAh |
| Battery Life |
About 11h |
About 8h |
About 8h |
About 8-9h |
| Charging Time |
1.5h |
2h |
1.5h |
1h |
| Dimensions |
58*25*10.4mm (excl. back clip) |
24*50*11.6mm (excl. back clip) |
24*50*11.6mm (excl. back clip) |
55*19*9.1mm (excl. back clip) |
| Wearing |
Back clip + Lanyard |
Back clip + Lanyard |
Back clip + Lanyard |
Back clip |
| Weight |
25g |
20.5g |
20.5g |
12.5g |
