Features: Brand new and high quality It does not need to be set. It is plug and play. It is a powerful tool to avoid rewiring and lossless wireless surround sound effects. It supports optical fiber, coaxial, L&R input, and lossless U disk playback transmission. One transmitter can send multiple receivers (up to three receivers can be sent to one transmitter). The receiver supports AUX output and provides 40W power amplifier to directly drive the passive speaker. The transmission distance can reach 50 meters. Specifications: Material: aluminum alloy Plug: UK Plug, EU Plug, AU Plug, US Plug(optional) Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: WR385 Transmitter Accessory: 1WR385T x1 2DC-5V/1A power adapter x1 3Digital optical cable x1 4power cable x1 5R&L cable x1 WR385 Receiver Accessory: 1WR385R x1 2DC-19V power adapter x1 3Power cable x1 43.5mm AUX cable x1 5R&L cable x1