A web television includes a display, a tuner, an internet module, and a PIP module. Each relationship may be determined by determining an angle associated with at least one joint, determining one or more states of a body part based upon the angle associated with at least one joint, and determining a probability of a body part being in each respective state. At least one locking hole is formed on an upper surface of the fastening part. When verification is successful, a Web server is able to monitor and manipulate data that indicates the operating states of all of the equipment that is managed by the equipment manager.