Features: Hardware parameters: US-based CP2102 chip, USB interface power supply No external power supply required. General standards: transparent transmission, supporting multiple communication protocols such as IEC62056-21, IEC1107, DLMS, MODBUS-, and USB&drivers. Supporting multiple versions of Windows-operating systems-, forMacOS, Linux-, and other systems; Installation: approx 25mmx15mmx5mm galvanized magnet-, strong magnetic adsorption (as specified in IEC 62056), environment: specified Specifications: Chip: US-based CP2102 chip Baud rate: Communication baud rate supports 300-19200bpsw Overall dimension: Diameter: 32mm Transmit receive spacing: 6.5mm Installation: 25mm x 15mmx5mm galvanized magnet-, strong magnetic adsorption (as specified in IEC 62056) Environment: specified working range：-25 ℃-70 ℃. Line length: approx 2m/78.74in Package Includes: 1PC CP2102 USB to Near Infrared Cable note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!