This listing is for one OT Systems FT080CF-SSTSA, a high-performance 8-channel contact closure transmitter designed to send dry contact or TTL signals over single-mode fiber optic cable. Ideal for secure and reliable industrial or security system integration. The unit is open box, never used, and in like-new condition. It has been stored securely and includes the original packaging. Key Features: 8-channel one-way contact closure transmission Single-mode fiber optic communication High-performance laser-based optics Industrial-grade design Ideal for access control, alarm systems, and automation applications Model: FT080CF-SSTSA Shipping: We offer Free Worldwide Shipping via Qatar Post, with tracking included