QCC5125 + XU316 high energy combination,Dual-core upgrade, Bluetooth/USB dual HD transmission Switch between multiple scenes with one click,PC/BT/PHONE three-position switch. 3.5+4.4 dual output interface,Mainstream interface, 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/// LL/ Adaptive/ HD/LDAC USB :Asynchronous 384kHz-32bit, DSD256 hard decoding Bluetooth master control:QCC5125 (CPU+ dual-core architecture) Bluetooth version:5.1 USB host controller:XMOS XU316 chip:ES9219MQ*2 USB driver-free mode:support Screen:0.96-inch 96x96 resolution OLED display Headphone output:single-ended 3.5mm + balanced 4.4mm Size:.32.0mmx72.2mmx12.5mm Weight:.37.3g Charging time:Less than 2h Battery capacity:550mAh high temperature lithium ion polymer battery Battery life:about 8 hours Output power 1: L+R equal 125mW+125mW (320 single-ended/+N Less than 1%) Output power 2: L+R equal 15mW+15mW (3000 single-ended/+N Less than 1%) Output power 3: L+R 340mW+340mW (320 balanced/+N Less than 1%) Output power 4: L+R equal 50mW+50mW (3000 balanced/+N Less than 1%) Frequency response:20Hz-50kHz (-0.8dB) Signal-to-noise ratio: equal 122dB (A-weighted) Noise floor: PO Less than 2V (A-weighted); Less than 2.7V (A-weighted) Output impedance: PO Less than 10(320 load), Less than 1.50(32 load) +N: Less than 0.0008% (1kHz/32k) The product appearance and printed words depending on the batch, but this does not affect use. Colour:Black Material:Aluminum Alloy Package Contents: 1 * headphone amplifier with accessories 1 * Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.