Optical fiber splitter
This item is designed to either couple or split an optical signal. Use this device to combine two accessories such as DVD, DAT, or Digital headphone into a piece of equipment with only one input. You may also use the device to split your digital signal and direct it to two similar devices.
Brand name(s) : LKG, Philmore

Features:
There are two (2) POF (plastic optical fiber) receptacles on one (1) end and one receptacle on the other end.
Dimensions: 2 1/4” L x 1 1/2” W x 3/4” D.