Model BTR5 BTR3K BTR3 BTR1 BTR1K μBTR
Volume Adjustment 60 Steps Independent adjustment 32 Steps Independent adjustment 32 Steps Independent adjustment Independent adjustment for some phones but simultaneously for iPhone and some other phone 32 Steps Independent adjustment 16 Steps Independent adjustment
Bluetooth Profile  A2DP，AVRCP，HFP，HSP A2DP，AVRCP，HFP，HSP A2DP，AVRCP，HFP，HSP A2DP，AVRCP，HFP，HSP A2DP，AVRCP，HFP，HSP A2DP，AVRCP，HFP，HSP
Supported Audio Formats  SBC，AAC，aptX, aptX Low Latency，
aptX HD, LDAC,		 SBC，AAC，aptX, aptX Low Latency，
aptX HD, LDAC,		 SBC，AAC，aptX, aptX Low Latency，
aptX HD, LDAC, LHDC		 SBC、AAC、aptX, aptX Low Latency SBC、AAC、aptX, aptX Low Latency SBC、AAC、aptX
Bluetooth Version 5.0 5.0 4.2 4.2 5.0 4.1
Bluetooth Chip  CSR8675 CSR8675 CSR8675 CSRA64215 QCC3005 CSR8645
DAC Chip   ES9218P×2 AK4377Ax2 AK4376A AK4376A AK4376A /
Amp Chip TPA6132A2
USB DAC Chip Xmos Xuf208 Comes With CSR8675 Comes With CSR8675 / Comes With QCC3005 /
USB DAC Sample Rate 384k/32bit
DSD 256		 48K/16bit 48K/16bit / 48K/16bit /
Dedicated Pairing Button √ √ √ / √ /
Dedicated Volume Button √ √ √ √ √ √
Transmission Distance (at open area) About 10m About 10m About 10m About 10m About 10m About 10m
Status Indicator Light&Display 0.49 inch monochrome OLED
Display battery, volume, Bluetooth codes,Menu setting items and adjustments		 RGB light indicates the input Bluetooth audio codec, charging and working status
Blue SBC, Cyan AAC, Purple aptX/aptX LL, Yellow aptXHD, White LDAC/DAC		 RGB light indicates the input Bluetooth audio codec, charging and working status
Blue SBC, Cyan AAC, Purple aptX/aptX LL, Yellow aptXHD, White LDAC/DAC, Green LHDC		 LED light indicates sound effect,
charging and working status		 RGB light indicates the input Bluetooth audio codec, charging and working status
Blue SBC, Cyan AAC, Purple aptX/aptX LL, White USB DAC		 LED light indicates
charging and working status
APP Control √ √ √ / / /
Call up Siri in iOS √ √ √ / √ √
NFC √ / √ / √ √
Hands-free Call / Mic √ √ √ √ √ √
In-Line Remote Control CTIA mic and In-Line Remote Control CTIA mic and In-Line Remote Control / / / /
3.5mm Headphone Output@32Ω 80mW 25mW 25mW 25mW 25mW 10mW
2.5mm Balanced Output@32Ω 240mW 78mW / / / /
SNR（(A-weighted） 122dB 122dB 120dB 　 118dB 95dB
USB Port Type C TypeC Type C Micro USB Type C Type C
Battery Life 550mAh 330mAh 300mAh 205mAh 205mAh 120mAh
Battery Life(AAC) 9h 11h 11h 8h 8h 8-9h
Charging Time 1.5h 1.5h 1.5h 2h 1.5h 1h
Dimensions 72×32×11.1mm  (excl. back clip)  58×25×11mm  (excl. back clip)  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 + Lanyard Back clip + Lanyard Back clip
Weight 43.7g 23.5g(excl. back clip)  25g 20.5g 20.5g 12.5g