The module adopts a 3-5 V power supply, which is suitable for more application scenarios. Industrial grade design, stable and reliable performance, with a signal transmission rate of up to 120Kbps; Equipped with power VCC blue indicator light and RXD, TXD green signal indicator light. The TTL to RS232 module can achieve mutual conversion between TLL (UART) and RS232 levels; 3-5 V wide voltage power supply, suitable for more application scenarios. When designing the module, special consideration was given to signal integrity and EMC characteristics, and multiple protection measures were added, so it can be used in various industrial grade applications. The module design is simple, the appearance is exquisite, and it is stable and reliable. 1: Functional features: 1. The module adopts a 3-5 V power supply, which is suitable for more application scenarios. 2. Industrial grade design, stable and reliable performance, with a signal transmission rate of up to 120Kbps; 3. Equipped with power VCC blue indicator light and RXD, TXD green signal indicator light. 2: Electrical parameters: Working voltage: 3.0V-5.0V Working current: 3mA Working temperature: -30 ℃ -70 ℃ Communication speed: 300-12000 (120K) bps, transparent transmission Color: As Shown Material: PC Package Contents: 5*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.