What is one characteristic of the Gizmo Watch?

The Gizmo Watch is specifically designed with features that cater to the needs of children and their guardians, and one notable characteristic is its waterproof ability combined with boundary alert features. Being waterproof ensures durability and practicality, especially for children who are active and may be exposed to water during play or daily activities. The boundary alerts serve as an excellent safety feature, allowing parents to set geographical boundaries and receive notifications when the child crosses these predefined areas. This aspect enhances monitoring and fosters a sense of security for both the child and the parent, making it a key selling point of the Gizmo Watch.

In contrast, the other characteristics presented are not applicable to the Gizmo Watch. It is not meant for adults, doesn't require a yearly contract as part of its service model, and while it does allow for a set number of contacts, it does not support unlimited contacts, which ensures that parents have control over who can communicate with their children.