1、EASY TO USE: OTDR launch cable box is mainly used to compensate for the blind spot in OTDR testing, with no joints in the middle of the optical fiber. 2、PRESS COVER DESIGN: Press the cover design to open it so you can use the wire and remove it. Press once more to rewind and conceal the cable after use to reduce clutter. 3、SCOPE OF APPLICATION: Suitable for single mode cables at 1310, 1550nm; Otdr fiber optic transmission cables are used to measure the loss and reflectivity of near end connections, as well as to remotely insert lossless optical fiber lines using otdr. 4、EASY CARRYING: With a small size and being lightweight as well, the launch cable box can be easily carried for convenient use. 5、APPLICABLE SCENARIO: Suitable for cable television networks, telecommunications networks, computer fiber optic networks, and optical testing equipment, etc.