Connector: Audio Stereo DC3.5 mm Jack to DB9 Female Serial Port. 1.8m DB9 Female to 3.5mm Serial Cable. Stereo 3.5 mm Jack to DB9 Pin Female Serial Port. DB9 TRS Connector / Audio DC3.5mm. Generic Serial Transfer Cable For Devices.
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USB 3.0 20Pin/19P Internal Header to Type E Adapter Connector USB 3.1 20 Pin Converter for Type C
Aliexpress UK
USB to standard 9-pin / DB9 serial port. - Supports RS232 serial interface. - Cable Length: 0.8M (approx.).
eBay
UGREEN USB Type C to 3.5mm Jack Phone Accessories Headphone Adapter For Xiaomi Mi 9 Oneplus 9 Pro
Aliexpress UK
Plug Type: USB 2.0 to 9 Pin Male RS232. Interface: RS232. It allows you to use bridge or connectivity between the USB and serial port interface. Colour: Blue. Happy Buying.
eBay
USB Adapter PC 6P+7P 13PIN Cable CD DVD Rom SATA To USB 2.0 Converter Slimline Sata 13 Pin Adapter
Aliexpress UK
Converts 9 pin joysticks, controllers and Paddles to work with your modern computers over USB. Supports:Mini Monster Retro Gaming JoystickAtari 2600 JoysticksAtari 7800 JoysticksAtari Paddle ControllersAtari ST Compatible JoysticksAmiga Compatible JoysticksCommodore 64 Compatible JoysticksSEGA Master System ControllersOfficial SEGA MegaDrive/Genesis Controllers (3 & 6 Button variants)Commodore Amiga CD32CD32 Retro Joystick Kits .
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3 In1 for Raspberry Pi Zero Adapter Kit Mini Adapter + Micro USB to USB Female OTG Cable + 20-pin
Aliexpress UK
USB 3.0 Motherboard Female Header. 20 pin USB 3.0 Female header (this is a 20 pin header). 1 x USB 3.0 20 pin Motherboard Female to 9 pin Male Cable. 9 pin USB 2.0 Male header (this is a 9 pin header).
eBay
USB Adapter PC 6P+7P CD DVD Rom SATA To USB 2.0 Converter Slimline Sata 13 Pin Adapter Drive Cable
Aliexpress UK
Specifications: Item: USB 9Pin to Two 9Pin Splitter. USB devices with shielded cable have many beneficial effects. Improving transmission speed: USB with shielded cable can also improve the transmission speed of USB devices, as it can noise signals generated by electromagnetic wavesand ensure a more stable data transmission rate.
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High-Quality USB Front Panel Adapter - Type-E Female to USB 3.0 19 PIN Male Adapter Internal
Aliexpress UK
Transfers your RS232 device to a USB device. Support the RS232 Serial interface. 1 x USB to RS232 Female Adapter.
eBay
MnnWuu USB Adapter PC 6P+7P CD DVD Rom SATA To USB 2.0 Converter Slimline Sata 13 Pin Adapter Drive
Aliexpress UK
SKU: 000369 BRAND: NEWLink EAN: 5055383403691 WEIGHT: 0.131.
eBay
NEW HL-340 USB to RS232 COM Port Serial PDA 9 pin DB9 Cable Adapter Support Windows7 64
Aliexpress UK