Specification: Size: 43.8 × 45 × 13.8mm Screen: 1.54 inch 240*240 HD touch screen Weight: about 36.8g DAC model: Dual ESS ES9219 chip Digital filter: 2 different filtering methods Endurance time: about 14.5 hours (different from use) Battery capacity: 650mAh lithium battery Storage method: 2TB external TF card Output port: headset output (3.5mm) Support Bluetooth 5.0 Launch: LDAC, APTX, AAC, SBC Receive: LDAC, SBC, AAC Support specifications: 384 kHz/32 bit, DSD 128 Audio format support: DSD (". ISO", ". DSF", ". DFF")/DXD/APE/FLAC/ALAC/WAV/AIF/DTS/MP3/WMA/AAC/OGG/M4A/M4A/M4A/ AC3/CUE/M3U Gain compensation: high, low 3.5mm Single -end output: Output power: 1.7V@32Ω (90MW@32Ω) Frequency response: 20Hz-40kHz (-0.5DB) THD+N: 0.0006%@32Ω (A-Weight @ 720MV) Dynamic range: 119db @ 32Ω (A-Weight) Channel separation: 72db@ 32Ω Signal ratio: 118db@32Ω (A-Weight) (A-Weight) Output impedance: <0.4Ω 4.4mm Balanced output: Output power: 2.75v@32Ω (236MW@32Ω) Frequency response: 20Hz-40kHz (-0.5DB) THD+N: 0.0004%@32Ω (A-Weight@ 1V) Dynamic range: 121db@32Ω (A-Weight) Class separation: 109db@32Ω Signal ratio: 119db@32Ω (A-Weight) (A-Weight) Output impedance: <0.8Ω