The device is a matching pair of wearable devices akin to wrist watches that allow instant, one-to-one communicative exchanges between wearers. Exchanges could occur through, short, whispered conversation or, even more discreetly, through sending and receiving the warmth of haptic touch.
Source: Howard, S., Vetere, F., Gibbs, M., et al. 2004. Mediating intimacy: Digital kisses and cut and paste hugs. In Proceedings of the 18th British HCI Group Annual Conference on HCI (BCS-HCI’04). 45–48.