| 摘要 |
<p>A charm, such as a pendant or brooch, is wearable adjacent to a user's torso. The charm comprises a vibrator (7), a power source (8), circuitry (5) for causing the power source to energise the vibrator in response to a wireless signal, and an actuator (9) for sending a further wireless signal to energise a vibrator of a further charm.</p> |
