Constant Touch is similar to a walkie-talkie or push-to-talk device that provides an open channel for constant updating throughout the day. It contains a single point transducer (such as a light) that is activated when one wants to say, “I’m thinking of you.” The form is configurable to suggest a physical presence as if “She is with me all the time.”
Source: Kjeldskov, J., Gibbs, M., Vetere, F., et al. 2004. Using cultural probes to explore mediated intimacy. In Australas. J. Inf. Syst. 11, 2, 102–115.