Waveshare 27076 Industrial USB TO TTL UART Serial Communication Module Converter Features: 1. Support USB expansion 8-way TTL (UART) with hardware flow control, can communicate simultaneously and independently 2. Onboard self-recovery fuse and protection diode can ensure stable output of current and voltage, prevent overcurrent and overvoltage, and improve impact resistance 3. Onboard TVS protection circuit can effectively suppress surge voltage and transient spike voltage in the circuit, lightning protection and anti-static 4. Onboard level conversion circuit, surge protection, anti-static, stable and safe communication 5. Onboard TTL serial port 3.3V and 5V level conversion circuit, can switch TTL communication level 6. Aluminum alloy shell, oxidized frosted treatment, CNC numerical control opening, firm and durable, exquisite workmanship 7. External 4 LED indicators, convenient for checking power supply and signal receiving and sending status Product parameters: 1. Host interface: USB 2. Device interface: TTL (UART) 3. Communication range: 1200bps-2M 4. Temperature range: -40 degrees Celsius to 85 degrees Celsius 5. Humidity range: 5%RH-95%RH 6. Operating system: Mac, Linux, Android, Windows11108.187 7. Product size: 104.5 x 70 x 28.6mm -USB interface Working level: 5V Interface type: USB-B type interface Interface protection: 200mA self-recovery fuse, ESD static protection -Power supply interface Interface type: 5VDC power socket Interface protection: overvoltage protection, reverse connection protection -TTL (UART) interface Interface type: 50PlN reverse connection interface Interface protection: TVS tube protection, surge and static protection Serial port TTL level 3.3V5V (adjustable)