OONO
RS232 Breakout Tester LED Monitor Module, DB9M/F x DB25M/F Breakout Module
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
Bottom line: The RS232 Breakout Tester LED Monitor Module, DB9M/F x DB25M/F Breakout Module is a category leader on buyer feedback in the keyboards & mice category, priced around $29.99, rated 4.6★ across 237 verified Amazon reviews. A confident buy for most shoppers in this category.
SpecPicks Verdict
SpecPicks classifies RS232 Breakout Tester LED Monitor Module, DB9M/F x DB25M/F Breakout… as a category leader on buyer feedback in the keyboards & mice category, based on 237 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. OONO's positioning sits comfortably above the category median. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for keyboards & mice of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 4.6★ average across customer reviews
- ✓ Backed by OONO's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- RS-232 interface DB9 male, DB9 female, DB25 male and DB25 female, supports any one of the connectors as Master Input, and supports any one of the connectors as Slave Output. Connect in series with any RS-232 interface for testing a serial RS-232 data link. Simple and easy, no oscilloscope is needed. DIP switch can setting disconnect or reconnect any signal, and support external probe test signal from male or female position.
- 8 double-color (red and green) LEDs indicate the logic states for respective data lines. Green for logic HIGH and red for logic LOW. Full RS232 spec compliant with LEDs for all 8 signals: DCD, RXD, TXD, DTR, DSR, RTS, CTS, RI.
- No external power required. No driver required. Plug and play. Jack sockets(nuts) on the tester can be unscrewed easily(with metal shell held in place) if needed to mate with another connector that has jack sockets.
- OS Compatibility: Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8 as well as Linux and Mac OS 10.X, ect.
- Typical application scenarios: Watching the TXD and RXD LEDs either changing states or flashing to know data transferring direction: from machine to computer or from computer to machine. Verifying TXD/RXD wires should be wired crossed(swap pin2 and 3) or straight through by observing TXD and RXD LEDs at a rest state. Verifying it is a DTE or DCE device (and whether you need a null modem or not). Verifying whether modem controls are active, even if they're not being asserted. Testing control sign
Full Specifications
| Brand | OONO |
|---|---|
| Color | [BLACK] or [WHITE] |
| Model | F-1068 |
| Style | DB9xDB25 MF |
| Style Name | DB9xDB25 MF |
| Unit Count | 1.0 Count |
| Part Number | RS232 Tester Series |
| Power Source | Battery Powered |
| Compatibility | Switch, Mac, Linux |
| Connection Type | Wired |
| Measurement Type | Logic Analyzer or Serial Protocol Analyzer |
| OS Compatibility | Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8 as well as Linux and Mac OS 10.X, ect. |
| Compatible Devices | Devices with DB9 or DB25 RS-232 connectors |
| Included Components | no |
Ready to buy?
RS232 Breakout Tester LED Monitor Module, DB9M/F x DB25M/F Breakout Module is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-26. Price and availability subject to change.
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