The HDV-TX1 is a Wired Handset with Articulating Probe (1m), Semi-rigid probe (1m) with 6mm diameter camera, and a Macro lens. The Extech HDV-TX1 is made for use with Extech's HDV600 VideoScope, connects via a patch cable (HDV-PC). This device consists of a semi-rigid probe with 6mm diameter camera and macro lens attached to a handheld unit. This unit includes an articulation knob for easy adjustment of the camera.