Extech hdv wtx wireless endoscope cameras 6mm dia for hdv600 series borescopes extech hdv wtx2 the extech hdv wtx2 wireless camera handset has an articulating semi rigid probe 2m with a 6mm diameter camera and macro lens it is compatible with the extech hdv600 series high definition video borescopes extech hdv wtx2 endoscope accessories probe diameter 6mm