General Specifications
Name/Model BR13 Hardware solution DAC: ES9018K2M, Op-amp: TPA1882, Bluetooth: QCC5125
working mode USB DAC/Bluetooth Receiving/Coaxial Decoding/Optical Decoding         Weight About 135g
Color Black Volume control Physical buttons
Dimensions About 98x96x26.5mm Channel balance L12~R12 (0.5dB per level)
Display 1.1-inch LCD display with backlight    
Buttons and Ports    
Buttons Power button (power on/play/pause)*1+Input select switch*1+EQ select switch*1+Volume button*2 USB 2-way Type-C (Power supply/data transfer)
Power input Type-C Single-ended line-out RCA plug
Digital optical input Optical in Digital coaxial input/output RCA plug
Digital optical output Optical out    
Unique Features
Bluetooth receiving (5.2) AAC/SBC/aptX/aptX LL/aptX Adaptive/aptX HD/LDAC Bluetooth codec indicate (on display) SBC
AAC
Max supported sampling rate Local decoding: Up to 96kHz/32bit aptX/aptX LL
aptX HD
Coaxial in decoding: Up to 192kHz/24bit
Optical in decoding: Up to 96kHz/24bit
Coaxial out decoding: Up to 96kHz/24bit (Frequency doubling) LDAC
aptX Adaptive
Optical out decoding: Up to 96kHz/24bit (Frequency doubling)
EQ adjusting Five EQ styles included: JAZZ-POP-ROCK-CLAS-MEM1-MEM2 Bluetooth multipoint  Supported
FIIO Control Supported Firmware upgrade Over-The-Air (OTA)
Standby Display automatically off if no signals for 5 minutes (select on the app: 5/10/15 mins)    
Power Supply Specifications
Power supply USB 5V/1A    
Audio Parameters    
Parts of performance and parameters of line-out/headphone output (RCA out, USB DAC/Optical decoding)
THD+N & Noise <0.0006% (1kHz/-0dB@10KΩ) SNR ≥114dB (A-weighted)
Crosstalk ≥108dB Noise floor <5uV (A-weighted)
Frequency response 20Hz~20KHz: damping<1.9dB Line output level 2Vrms
Parts of performance and parameters of line-out/headphone output (RCA out, Coaxial decoding)
THD+N & Noise <0.0006% (1kHz/-0dB@10KΩ) SNR ≥114dB (A-weighted)
Crosstalk ≥109dB Noise floor <5uV (A-weighted)
Frequency response 20~20KHz: damping<1.9dB
20Hz~50KHz: damping<1.2dB
Line output level 2Vrms
Parts of performance- Bluetooth LDAC receiving and Line-out output
THD+N & Noise <0.002% (1kHz/-0dB@10KΩ) SNR ≥113dB (A-weighted)
Crosstalk ≥98dB (1kHz/-0dB@10KΩ) Noise floor <5uV (A-weighted)
Frequency response 20Hz~20KHz: damping<0.2dB Line output level 2Vrms