Optional Operator Remotes allow treatment stop, start and pause, as well as change in amplitude at any time during a treatment session. Each remote is color-coded for designation between channels. As there are two channels you require two remotes. Includes a pair of remotes (one for each channel) Operator Remote - Channels 1 and 2 Operator Remote - Channels 3 and 4 These are designed for the Intelect range of interferrential units. Please note there is a lead time of 14-21 days on all chattanooga products. We do try to get them faster if at all possible.