StarTech.com Serial conversion cable/1m/RS232C - 3.5mm stereo mini plug/male - male/DB9 9 pin - 3.5mm audio mini jack/Serial control of projectors, digital signage, TVs, etc. from a computer

DB9 to 3.5mm Stereo Mini Jack Conversion Cable: 1m RS232C serial control cable that allows you to control 3.5mm to RS-232C serial devices. Used for setting and adjusting TVs, projectors, digital signage displays, etc. that require 3-pole RS-232C serial control from a 3.5mm mini jack.
High-quality design: The cable section uses high-quality 28AWG copper wire, aluminum mylar shielding, and PVC coating to prevent damage from bending and pulling. The PVC material connector has a strain relief function and uses a metal shell to prevent EMI interference.
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*For computers without a serial port, a USB-A or USB-C to DB9 conversion adapter is available (product model number 1P3FP-USB-SERIAL / ICUSB232C). In this case, a DB9 gender changer (male-female conversion adapter) such as the manufacturer's GC9SF is required (sold separately).