A ferrite sintered body is composed of an oxide containing, as metal element, at least Fe and Zn and at least one selected from Ni, Cu and Mn. The magazine includes a first wall and a second wall coupled to the first wall to define an enclosure. A first noise power estimate may be calculated for the downlink channel based on a plurality of the DPCH TPC bits. One preferred embodiment includes an attachment device having a band carrying the housing and adapted to fit around the neck of the dog so that the housing is located in front of the chest of the dog.