The Oehlbach Optosel 4:1 MKII (successor of the Optosel 4:1) receives up to four digital optical signals and transmits them unprocessed to an AV receiver. The switch box is perfectly suited in combination with AV receivers that only offer a single TOSLINK slot. The device, which sits in a solid metal housing, supports sampling rates and a resolution of up to 96kHz. A high-quality and loss-free signal transmission is thus guaranteed. Both compressed and uncompressed audio signals are supported. A remote control for the comfortable change of the inputs is included in the scope of delivery as well as a power supply unit.