An electronics technician in Mumbai needs to verify serial port wiring for a custom industrial machine.
Using the OONO RS232 Breakout Tester, they confirm correct wiring and device type within minutes, saving time and avoiding costly errors.
You save 2,260 (37%)
37% off the seller list price
Estimated doorstep delivery by 2 Nov - 4 Nov from USA






Reliable Serial Link Testing at Cost-Effective Price
The OONO RS232 Breakout Tester is a professional-grade device designed for quick and reliable testing of serial RS-232 data links. It connects in series with any RS-232 interface, providing real-time status via 8 double-color LEDs, indicating logic HIGH or LOW for all 8 signals. Its plug-and-play design requires no external power or drivers, making it ideal for technicians and engineers in India who need fast diagnostics without complex setup.
The device supports Windows, Linux, and Mac OS, ensuring compatibility across various systems. Its DIP switch allows setting disconnect or reconnect signals, and external probe support enables testing from male or female connectors. Typical applications include verifying wiring correctness, data transfer direction, device type (DTE/DCE), and control signal activity, helping troubleshoot serial communication issues efficiently.
Imported from USA, this tester offers a reliable, durable solution for industrial and scientific environments in India. Its compact design and easy screw-on jack sockets facilitate seamless integration with existing equipment. Delivered in 12-14 days, with duties included, it is a cost-effective tool for serial communication testing in Indian labs, factories, and repair shops.
Reliable USA-Imported Quality
OONO RS232 Breakout Tester is sourced directly from US manufacturers, ensuring high-quality components and full RS-232 compliance. Its LED indicators provide clear, immediate status updates, reducing troubleshooting time for Indian technicians. The device's plug-and-play design eliminates the need for external power or drivers, making it suitable for on-site diagnostics and quick repairs.
Ideal for Professional and Hobbyist Use
Designed for engineers, technicians, and electronics hobbyists in India, this tester verifies wiring, device type, and control signals efficiently. Its compatibility with Windows, Linux, and Mac OS ensures broad usability. Skip it if you require advanced oscilloscope features or testing beyond serial data link verification.
Typical situations where OONO RS232 Breakout Tester LED Monitor helps — illustrative scenarios, not customer reviews.
An electronics technician in Mumbai needs to verify serial port wiring for a custom industrial machine.
Using the OONO RS232 Breakout Tester, they confirm correct wiring and device type within minutes, saving time and avoiding costly errors.
A factory engineer in Delhi tests control signals between automation systems and projectors.
The tester's LED indicators reveal signal activity instantly, ensuring proper communication setup without complex equipment, with delivery in 12-14 days.
| Connection Type | Series RS-232 interface |
| Recomm. Use | Serial link testing, wiring verification, device type detection |
| Reapplication math | 8 LEDs, continuous status, no consumables |
| Shelf Life | Not applicable |
| Compatibility | RS-232 serial communication devices |
CrowCrowCrow helps you bring this product to India. Any warranty is offered by OONOunder its own policy.
| Feature | OONO RS232 Breakout | Others |
|---|---|---|
| Build Quality | Full RS-232 spec compliance, durable components, sourced from US manufacturers | Varies by brand, often lower build quality, limited compliance |
| LED Indicators | 8 double-color LEDs for clear logic state indication, immediate troubleshooting | Fewer LEDs or single-color, less intuitive signals |
| Compatibility | Supports Windows, Linux, Mac OS, plug-and-play, no drivers | Limited OS support, driver issues common |
| Price per unit | ₹3,850 per piece | Varies, typically ₹2000-₹3000 for similar quality |
| SKU | auu9710 |
| GTIN | 6937902391216 |
| Brand | OONO |
| Model Number | OONO-F1023 |
| Connector Type | DB9 Male to Female |
| LED Indicators | 8 double-color LEDs |
| Supported OS | Windows 98/Me/XP/2000/2003, CE, Vista, 7, 8, Linux, Mac OS 10.X |
About OONO
OONO specializes in professional electronic testing tools, ensuring high-quality, US-imported components for reliable diagnostics in India.
Compliance & Legal
No specific safety or regulatory claims; device complies with standard serial communication testing requirements; no certifications required.
Share your experience
Bought this from CrowCrowCrow? Other buyers want to hear how it went.

This item:
OONO RS232 Breakout Tester LED Monitor, DB9 Male to Female | Serial Data Link Test Device
3,850

This item
OONO RS232 Breakout Tester LED Monitor, DB9 Male to Female | Serial Data Link Test Device
3,850
Total price:
18,610
You save 10,920 (37%) Extra3 items selected
3 items
18,610You save 10,920 (37%) Extra
| Attributes | Current ![]() | ![]() | ![]() | ![]() | ![]() | ||
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 3,850 6,110 | 12,300 17,340 | 2,460 6,080 | 2,470 3,810 | 5,910 8,920 | 3,530 5,450 | 1,730 2,760 |
| Brand Name | OONO | KLEIN TOOLS | Cruiser | OFCN | OONO | Quartet | uxcell |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
Why shop with us
One price. One payment. No surprises.
High risk
Buying Direct
Crowcrowcrow
Safe Lane