Features 1.Flexible Sound Switching: Easily switch between 4 SPDIF sound sources and route them to 2 output devices. 2.Supports Various Sound Formats: Enjoy premium sound with support for DTS HD, for Dolby TrueHD, LPCM2.0, DTS, for Dolby AC3, and DSD. 3.Long Transmission Distance: Transmit your sound signals up to 40m using optical fiber cables with loss less than 0.2dB/m. 4.Simple Remote Control: Easily control your sound sources and outputs with the included remote control (battery not included CR2025). 5.Compact and Durable Design: The SPDIF sound switcher features a compact and sturdy design, suitable for various sound setups. specificationItem Type: SPDIF Digital Optical Sound 4x2 Switcher_x000D_ Material: Aluminum Alloy_x000D_ Input: SPDIF x 4_x000D_ Output: SPDIF x 2_x000D_ Supported Sound Formats: DTS HD, For Dolby TrueHD, LPM2.0, DTS, For Dolby AC3 DSD_x000D_ Peak Wavelength: 650nm_x000D_ Maximum Baud Rate: 16Mbps_x000D_ Output Cable Distance: 40m / 131.2ft (Using Fiber Optic Cable Loss Less Than 0.2Db/M)_x000D_ Maximum Operating Current: 100mA_x000D_ Remote Control Battery: CR2025 x 1 (Not Included)_x000D_ Voltage: 100-240V PackageList1 x SPDIFDigital Optical Sound 4x2 Switcher 1 x Remote Control 1 x Power Adapter 1 x User Manual