--- product_id: 4266922 title: "Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter" brand: "stsi" price: "Β£13.18" currency: GBP in_stock: true reviews_count: 8 category: "Stsi" url: https://www.desertcart.co.uk/products/4266922-bargain-cable-db9-female-db9-female-null-modem-mini-adapter store_origin: GB region: United Kingdom --- # Compact 6x4x2 inch form factor DB9 Female to Female Null Modem Adapter Secure screw-lock design Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter **Brand:** stsi **Price:** Β£13.18 **Availability:** βœ… In Stock ## Summary > πŸ”— Connect with confidence β€” keep your legacy gear in the game! ## Quick Answers - **What is this?** Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter by stsi - **How much does it cost?** Β£13.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/4266922-bargain-cable-db9-female-db9-female-null-modem-mini-adapter) ## Best For - stsi enthusiasts ## Why This Product - Trusted stsi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Proven Durability:** Trusted by tech pros with a solid 4.2-star rating and consistent performance under daily use. - β€’ **Compact & Lightweight:** Weighing just 0.32 oz, it’s the perfect travel companion for on-the-go professionals. - β€’ **Legacy Tech Made Modern:** Revive and integrate older switches and test equipment without missing a beat. - β€’ **Reliable Screw-Lock Fit:** Precision-aligned screws ensure a stable, no-slip connection every time. - β€’ **Seamless Serial Connectivity:** Effortlessly bridges USB-to-serial cables with legacy devices for uninterrupted workflow. ## Overview The STSI NULL-A-9FF is a compact, lightweight DB9 female-to-female null modem adapter designed to connect USB-to-serial cables with older switches and test equipment. Featuring secure screw-lock fittings and a durable build, it offers reliable performance favored by professionals needing seamless legacy device integration. ## Description Brand: STSI Model: NULL-A-9FF Review: Great, inexpensive - Great, inexpensive, crossover adapter. Been using it constantly to connect a USB-to-serial console cable to old switches and it hasn't failed me one bit. Screws line up nicely on both sides for a secure fit when needed. Review: They get the job done... - I bought 4 of these for my test equipment - they got the job done. Though the screw on one of these did snap under medium torque... the other 3 adaptors were fine under the same torque. However, on a different one of these adaptors, I had to β€œopen up” one of the pin holes slightly before it would accept my male cable. I would probably buy again. ## Features - Brand: STSI - Model: NULL-A-9FF ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #143 in Modem Cables | | Customer Reviews | 4.5 out of 5 stars 81 Reviews | ## Images ![Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter - Image 1](https://m.media-amazon.com/images/I/71bXJ3iqIkL.jpg) ![Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter - Image 2](https://m.media-amazon.com/images/I/71kcNDbCilL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great, inexpensive *by O***Z on July 29, 2017* Great, inexpensive, crossover adapter. Been using it constantly to connect a USB-to-serial console cable to old switches and it hasn't failed me one bit. Screws line up nicely on both sides for a secure fit when needed. ### ⭐⭐⭐⭐ They get the job done... *by D***N on November 23, 2013* I bought 4 of these for my test equipment - they got the job done. Though the screw on one of these did snap under medium torque... the other 3 adaptors were fine under the same torque. However, on a different one of these adaptors, I had to β€œopen up” one of the pin holes slightly before it would accept my male cable. I would probably buy again. ### ⭐⭐⭐⭐⭐ Cheap, shipped fast, and it works *by W***T on April 25, 2012* It is not very often that I can get something cheap, fast, and that performs as it should. This is one such item. The hardware seems to be durable, it is very compact, and it performs the simple null modem task. ## Frequently Bought Together - Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter - Gearmo USB to Serial RS-232 Adapter with LED Indicators, FTDI Chipset, Supports Windows 11/10/8.1/8/7/, Mac OS X 10.6 and Above --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/4266922-bargain-cable-db9-female-db9-female-null-modem-mini-adapter](https://www.desertcart.co.uk/products/4266922-bargain-cable-db9-female-db9-female-null-modem-mini-adapter) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-20*