?? This portable SPDIF / Toslink digital optical audio 4x2 True Matrix is specially designed to make your A/V device use more convenient， more comfortable， more productive and more cost-efficient. This SPDIF 4x2 Matrix includes four SPDIF input ports and two SPDIF output ports， which can connect the four SPDIF output signal source and two SPDIF input devices. It can be easily split or switched between four SPDIF signal and two SPDIF signal receiving equipment. This SPDIF 4x2 Matrix offer solutions for noise， space and security concerns， data center control， information distribution， conference room presentation， school and corporate training environments. 

Features: 
Four ways of optical fiber signal input split or switch to two sets of SPDIF signal receiving device.
4 Inputs / 2 Outputs for Optical / SPDIF / TOSLink Audio Management; A True Matrix for Any Input to Any Ouput.
Audio format support : DTS-HD/Dolby-trueHD/LPCM2.0/DTS/Dolby-AC3/DSD  
The two outputs port can be the same， sharing the same input source or be different from two different inputs source.                        
Support signal retiming
Used optical fiber cable loss less the 0.2Db/m， and support Data Rate Up To 16Mbps， the Output distance is up to 40m. 
The input control can through R/M and also can directly press the button.
Support last time working state memory when power off.
Over-voltage protection， can prevent the damage caused by connecting unmatched power adapter to the machine， if the light for standby indication flashes， it shows that the output voltage from the power adaptor is too high and the adaptor needs to be changed.
LED status indication， it can tell us the working state of the device very easily.
Active IC Circuit for Optimum and Lossless Signal Transfer; Flawless Switching
No loss of quality; Installs in minutes. 

Specifications:     
Model: VHD-SM4X2                     
Peak wavelength: 650nm
Max baud rate: 16Mbps
Output cable distance: ≤40m(Use the optical fiber cable loss less the 0.2Db/m )
Max working current: 100mA
Power adapter format: Input: AC (50HZ， 60HZ) 100V-240V; Output: DC5V/500mA
Operating Temperature range: (0 to +40℃)
Operating Humidity range: 5 to 90%RH (No Condensation)
Color: White
Main item size: 12.8 * 6.7 * 3.5cm / 5.04 * 2.64 * 1.38in 
Main item weight: 171g / 6.04oz 
Package size: 21.5 * 15.0 * 5.5cm / 8.46 * 5.90 * 2.17in
Package weight: 326g / 11.52oz

Package list:
1 * SPDIF / Toslink digital optional audio 4x2 True Matrix
1 * Power Adapter
1 * English User Manual