1、Push Pull Lid Design: This patch cable box is designed with a push pull lid, you can take out the patch cables by pushing up the lid, and then push it again to hide the patch cables after you finish using them, avoiding cluttering. 2、Compact And Portable: This patch cable box is small in size and light in weight, so it is very convenient to go out and carry it with you. 3、Excellent ABS Material: This patch cable box is made of excellent ABS material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 4、Wide Application: This patch box is suitable for single mode cable 1310 or 1550nm, and OTDR fiber optic launch cables are used to measure loss and reflectivity of near end connections, as well as to insert fiber optic lines remotely and non destructively using the OTDR. 5、Main Functions: This patch cable box is mainly used to make up for the OTDR test blind spot without any fusion splice head in the middle of the fiber.