1、Support optical output, support coaxial output. Optical coaxial interface supports 1 channel transmission. 2、Support RCA stereo output, support 5mm stereo headphone jack output. Supports transmission of 192KHz audio sampling rate. 3、High quality iron shell, strong and durable, long service life. Small and light, easy to carry. 4、The 5mm stereo headphone jack is equipped with a high‑performance audio amplifier. 5、Support startup & shutdown noise reduction function, support no signal automatic mute function. 1 x ARC to Audio Adapter1 x Charging Cable1 x Instruction Manual Item Type: ARC to Audio AdapterMaterial: Iron ShellColor: As shown in the picturePower Supply Interface: Micro USBMaximum Working Current: 65mAWorking Environment Temperature: -10~+55℃Storage Temperature: -20~+60℃Working Humidity: 10~90%RH (non-condensing)Storage Humidity: 5~95%RH (non-condensing)