BTR3K 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