| Model |
BTR3K |
Color Available |
Black |
| Weight |
About 23.5 g（incl. battery） |
Dimensions |
About 58×25×11mm (exclusive of back clip) |
| Audio Input |
Bluetooth connection (Bluetooth 5.0 supported) |
Supported Audio Format(s) |
AAC/SBC/aptX/aptX LL/ aptX HD/LDAC |
| Headphone Output |
3.5 mm stereo jack |
Mic Function |
Support Bluetooth call, built-in omnidirectional microphone; support external microphone of CTIA cable |
| Balanced Headphone Output |
2.5mm jack |
USB Port |
Type C USB |
| Channel Balance |
≤0.1 dB |
Drive Ability |
16~100Ω（PO） |
| Volume Control |
Side buttons |
16~100Ω（BAL） |
| APP interconnection |
Supports setting through App |
Status Indicator Light |
RGB light indicates the input Bluetooth audio codec,charging and working status |
| Charging Time |
≤1.5 h (DC 5V 500mA) |
Bluetooth Codes Display |
Supported |
| Battery Capacity |
330 mAh |
Power Input |
Recommend DC 5V 500mA |
| Output Power |
PO about 25mW（32Ω loaded） |
Frequency Response |
20Hz～20kHz (aptX connection） |
| PO about 50mW（16Ω loaded） |
| BAL about 78mW（32Ω loaded） |
20Hz～40kHz (LDAC connection） |
| BAL about 40mW（16Ω loaded） |
| THD+N |
PO＜0.003%(LDAC 1kHz A-weighted) |
Output Impedance |
PO≤0.3Ω（32Ω loaded） |
| BAL＜0.002%(LDAC 1kHz A-weighted) |
BAL≤0.5Ω（32Ω loaded） |
| Noise Floor |
High power model& A-weighted
PO≤1.0uV BAL≤2.0uV |
Amplitude |
PO：0.9V（32Ω /THD+N＜1%） |
| PO: 0.9V (no loaded) |
Low Power model & A-weighted
PO≤4.5uV BAL≤4.5uV |
BAL: 1.59V（32Ω /THD+N＜1%） |
| BAL: 1.8V(no loaded) |
| SNR |
PO≥119dB (32Ω A-weighted) |
Crosstalk |
PO≥ 73dB（1kHz 32Ω loaded） |
| PO≥ 114dB（1kHz no loaded） |
| BAL≥122dB(32Ω A-weighted) |
BAL≥ 108dB（1kHz 32Ω loaded） |
| BAL≥119dB（1kHz no loaded） |
| Sampling Rate Supported Up to |
48kHz/16bit（USB DAC） |
Accessories |
Type C USB charging cable*1, Quick Start Guide*1, Warranty Card*1,Back Clip*1 |
| Chips Used |
DAC: AK4377 A* 2 , Bluetooth： CSR8675 |
| Battery Life & Test Conditions (The test result is based on specified test conditions and just for referrence) |
| Battery Life |
Low Power model：BAL &P about 11h
High power mode：PO about 9.5H，BAL about 7.5H |
Bluetooth Transmitter |
iPhone （AAC） |
| Connected Headphones |
M3 open earbuds（27Ω） |
Volume |
With set output at 40mV |
