The AT8LK is the newest kit. It is perfect for the technician who works with both phone systems and computer networks. The all-new AT8LK LAN Toner is similar to the AT8 but offers new circuitry and microprocessor controls. A simple push button controls all the outputs and modes of the LAN Toner. And you can even blink the hub or switch port activity LED or the LAN LED on the network interface card in a PC. It comes with the 200GX tracer and the belt case.