The device allows for long distance communication between individual Senders. While this technology has great potential, a few problems have prevented its widespread use.
The Senders are expensive to build and maintain. They are also large enough to fill a small room. To make things even more difficult, users of the device experience dreamlike sensations which can confuse communications. Because of this, many people prefer to hire professional sender technicians to transmit messages for them.
Few are wealthy enough to own a private sender. However, most cities provide senders the public can use for a fee.
Despite these problems, use of the senders has only increased since their creation.