â·ÃÊͺ¶ÒÁÃÒ¤Ò The Extech CT20 is a one person solution to wire and cable testing, both local and remote. CT20: Remote & Local Continuity Tester One person operation for wire and cable testing Features: A bright flashing LED and loud pulsating beeper indicate local continuity Remote continuity with the use of the remote probe Flashing remote probe - two lead, bi-color (red/green) LED probe allows a single user to identify up to three wires or cables at a time Lightweight and pocketsized, clips on and hangs from the cable(s) under test without falling off Great for Electricians and Helpers, Cable TV and Audio System Installers, Alarm Technicians, Plumbers, HVAC Installers etc. Specifications: Dims: 3.6x2.2x1.14" (90x57x29mm) Wt: 9.2oz (260g) AC CT20 Extech Multimeter Voltage Detector