This bi-Directional timecode cable is designed to connect Tentacle Sync Timecode Generator to any devices that uses BNC timecode in/out connector and vice versa. Connector A: metal 3.5mm TRS Jack. Connector B: BNC connector. Cable length: 19.68in/50CM (any length cable can be make). Each units are checked and tested in full to avoid any short circuit before we send it out. Durable & High-Performance Cables. Each cable passes the test before shipment. We are committed to resolving any problems. Contact us for dedicated assistance.