850 nm, LED emitter. The typical coupled power is 40 uW and can operate up to 200 Mb/sec. Maximum rise/fall time for the part is 4 ns.This product features a solid machined stainless steel housing that resists corrosion and environmental attack. The optics are solidly mounted and are encapsulated with an epoxy product. The actual diode is hermetically sealed. The combination of these features produces an extremely rugged product.