Audiophile HiFi Bluetooth-compatible Headphone Amplifier Amplifier Receiver<br> Features:<br> Built-in high capacity battery<br> Support charging over voltage protection<br> Support high and low impedance earphone switch<br> Support 16~600 Ω impedance earphone<br> Support output volume adjustment and bass adjustment<br> Support one 3.5mm headphone port and one 3.5mm input port<br> Support Bluetooth connection<br> Type-c port for charging<br> Aluminum alloy material, full of texture<br> Specifications:<br> Input port:3.5mm（TRS）<br> Headphone port:3.5mm（TRS）<br> Charging port:Type-c<br> Bluetooth-compatible Version:BT 5.0<br> Built-in battery:3.7V1400mA<br> Charging voltage:5V500mA<br> Standby power:38mA<br> Maximum working current:250mA<br> Duration:≥6 hours<br> 16Ωheaphone power:110 mW<br> 32Ωheaphone power:105 mW<br> 150Ωheaphone power:6 5mW<br> 300Ωheaphone power:35 mW<br> 600Ωheaphone power:20 mW<br> Maximum output Vp-p:9.9Vp-p<br> THD+N:0.02%<br> Signal to noise ratio:100db<br> Frequency response:20hz～20Khz<br> Cross talk:100db<br> Sound balance:0.3db<br> Bare size:104.5x63.5x16.5mm<br> Bare weight:146.5 g<br> Working environment temperature:-20 to +60℃<br> Shell material:Aluminum Alloy<br> Package Included:<br> 1 pcs HIFI Headphone Amplifier<br> 1 pcs 3.5mm Audio Cable<br> 1 pcs Charging Cable<br> 1 pcs User Manual