<p>Adopting CH344Q, SP3485 chips, the solution is mature and stable.</p> <p>The 480Mbps high-speed USB interface is stable, firm, reliable and compatible.</p> <p>Adopting USB2.0-B interface and 5.08mm terminal block, plugging and unplugging are smooth, firm and reliable.</p> <p>With independent power isolation and signal isolation circuits.</p> <p>The USB end is equipped with electrostatic ESD protection circuit to protect the rear circuit and equipment.</p> <p>The RS485 end is equipped with overcurrent protection, surge protection, and fulmination gas discharge protection circuit.</p> <p>The onboard 120R terminal resistance selection dip switch can increase the stability of signal transmission and reduce interference.</p> <p>Baud rate support range: up to 3Mbps.</p> <p>Aluminum alloy shell, oxidized frosted treatment, precise opening, firm and durable, exquisite workmanship.</p> <p>10 external LED indicators are convenient for checking power supply, device configuration status and signal receiving and sending status.</p> <p>Due to different batches, there may be differences in product appearance and printed text, which will not affect use</p> <p>Color: black</p> <p>Material: Aluminum alloy</p> <p>Package Contents:</p> <p>1 x USB serial port module</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>