QCC5125 + XU316 high energy combination,Dual-core upgrade, Bluetooth/USB dual HD mission Switch between multiple scenes with one click,PC/BT/PHONE three-position switch. 3.5+4.4 dual output interface,Mainstream interface, durable 0.96-inch OLED display,Display more complete information, more convenient to view information. Double curved glass,Better look, feel and grip. Bluetooth Format:AAC/SBC/aptX/aptX LL/aptX Adaptive/aptX HD/LDAC USB DAC:Asynchronous 384kHz-32bit, DSD256 hard decoding<br><br>Bluetooth master control:QCC5125 (CPU+DSP dual-core architecture) Bluetooth version:5.1 USB host controller:XMOS XU316 DAC chip:ES9219MQ*2 USB DAC driver-free mode:support Screen:0.96-inch 96x96 resolution OLED display Headphone output:single-ended 3.5mm + balanced 4.4mm Size:Approx.32.0mmx72.2mmx12.5mm Weight:Approx.37.3g Charging time:Less than 2h Battery capacity:550mAh high temperature resistant lithium ion polymer battery Battery life:about 8 hours Output power 1: L+R greater than equal 125mW+125mW (320 single-ended/THD+N Less than 1%) Output power 2: L+R greater than equal 15mW+15mW (3000 single-ended/THD+N Less than 1%) Output power 3: L+R Greater than 340mW+340mW (320 balanced/THD+N Less than 1%) Output power 4: L+R greater than equal 50mW+50mW (3000 balanced/THD+N Less than 1%) Frequency response:20Hz-50kHz (-0.8dB) Signal-to-noise ratio:greater than equal 122dB (A-weighted) Noise floor: PO Less than 2µV (A-weighted); BAL Less than 2.7µV (A-weighted) Output impedance: PO Less than 10(320 load), BAL Less than 1.50(32Ω load) THD+N: Less than 0.0008% (1kHz/32kΩ) The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:Black Material:Aluminum Alloy<br><br>Package Contents: 1 * headphone amplifier with accessories 1 * Chinese and English instruction manual <br