What's in the box:

Digital to Analog Audio Converter 192kHz 24bit DAC Converter Optical Coaxial Input RCA 3.5mm Audio Output Adapter (Standard)

Features:
One optical fiber and one coaxial input interface. Connect to DVD, HD player and other devices.
One RCA output interface, connected to the power amplifier system.
One channel 3.5mm audio output interface, Connected to headphones.
Eliminate the noise when there is no input signal, and automatically mute when the non-audio signal is input.
Support 192kHz 24bit sampling rate.
Support volume adjustment. Support bass adjustment.
Metal shell, anti-interference.

Specifications:
Type: Audio Converter
Material: Metal
Color: Black
Support Audio Format: PCM
Separating Degree(1KHZ): 94DB
Response Frequency: 20Hz~20KHz-0.2db
Signal-to-Noise Ratio(SNR): -100DB
Total Harmonic Distortion(THD+N): 10Hz~20KHz 0.25-0.065%
Blocking Time: 0.577Fs
Sampling Rate: 32~192KHz
Bit Rate: 16~24Bit
Output Electrical Level: 7V
Earphone Output Power: (RL=32O)30mW
Output Impedance: 47 ohms
Working Voltage: +5V.Maximum Voltage: 6V
Maximum Power Consumption: 100mA
Package Size: 7.6*7*1.6cm / 3.0*2.8*0.6in
Package weight: 150g / 5.3oz

Package Size:
1 * DAC Converter
1 * USB Power Cable
1 * User Manual