Features: The RS232 of the laptop extension is converted to a serial interfaces through USB, making it efficient and convenient to connect to a printer Supports RS232 serial interfaces, remote power management, and fully automatic serial communication handshake protocol The stable signal transmission is built with professional chips, which provide more stable performances and strong compatibility Using PVC environmentally friendly materials, insulation and flame retardant, the nickel plated joint is more durable and reliable for use The interfaces is thickened with a nickel plating layer, which has the functions of corrosion resistance, acid and alkali resistance, high and low temperature resistance, and longer service life Note: Please identify the interfaces and plug before purchasing. This product is an RS232 9-pin plug. Please identify the printer RS232 9-pin interfaces to avoid purchasing errors Specifications: Item: USB to db9 RS232 Connector Cable Material: PVC Cable Length: approx 120cm/47.24in 200cm/78.74in 300cm/118.11in Package Includes: 1PC USB to db9 RS232 Connector Cable note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.