






🔌 Test smarter, not harder — continuity at your fingertips!
The Extech CT20 is a rugged, pocket-sized continuity tester designed for professional wire and cable diagnostics. Featuring a bi-color LED remote probe for polarity and continuity checks, modular RJ11 connectors, and low power consumption, it enables efficient single-person operation with reliable results on the go.









| Manufacturer | Extech |
| Part number | CT20 |
| Item Weight | 100 g |
| Product Dimensions | 5.59 x 2.9 x 9.15 cm; 100 g |
| Batteries | 1 AA batteries required. (included) |
| Item model number | CT20 |
| Size | 2 |
| Color | green |
| Style | Standard |
| Material | ABS |
| Item thickness | 1 Inches |
| Power source type | Battery Powered |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Specification met | CE |
| Included components | Product & Instructions Guide |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
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