The defining line between femtocell, enterprise femtocell and picocell is grey, both in terms of functionality and in the eyes of the customers. Femtocell and enterprise femtocell capacity is generally defined as somewhere between 4 and 32 users, depending on the applications, whereas a picocell is generally thought to support 16 to 64 users or more. Femtocells are almost always equipped with automatic self configuration capabilities whereas a picocell could include automatic or manual configuration capabilities, or even a combination of both. The same overlapping differences for the femtocells and picocells apply to power outputs, the ability to cluster with soft handoff, and indoor or outdoor implementations.