Features: brand new and high quality This product through a high-end isolation chip to achieve the TTL, RS485 on both sides of power and signal perfect isolation, anti-interference ability. Power is a wide voltages input (3v-5.5v), to achieve the 3.3v system and 5v system is perfectly compatible.3.3v or 5V communication signals can match. Power and signal completely isolated, high performance, isolation voltages up to 2500VDC. Industrial design, anti-interference ability, while the use of more powerful 485 lightnning designed, industrial and field can be used in harsh environments, the working temperature of -40-85degree. Using half-hole process design, thickness 0.8mm, class easy to use, but also welding terminals use.With RXDTXD signal indicator, send and receive situation view. Specifications: Material:PCB Size:Approx.36.07x29.08mm/1.42x1.14inches Package Includes: 1x TTL to RS485 Module note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.