E-Series Add-On devices can only be used to expand an existing E-Series System. Add-On devices do not have a timing controller or a power supply cord so they cannot be operated by themselves – a Master device is always needed in the system.
Each E-Series Add-On device is supplied with hinge hardware and a set of thin “Gap Seals” that can be used if necessary to cover the space between two adjacent devices. Add-On devices also include a 4 year product warranty, a 1 year bulb warranty, an arrival guarantee, and free shipping to most locations in Canada and USA; all included in the price. There is nothing else you need to purchase to expand your existing E-Series System and reduce your treatment times.