Robust Fireproof Construction: PCB and housing materials are selected for fireproof and flame-retardant characteristics, providing enhanced safety and durability in harsh environments. Excellent high-temperature resistance and stable electrical performance ensure long-term reliable operation, reducing maintenance frequency and downtime in industrial control systems. High-Current DC5.5-2.1 Power Output: Integrated DC5.5x2.1mm jack allows the module to supply higher current for powering external circuits such as sensors, relays, or other embedded devices. This simplifies wiring, reduces the need for separate power adapters, and makes the module suitable as a compact, centralized power and communication hub in development benches. Color: Green Material: plastic Package Contents: 1*USB to 4-Way TTL Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.