Various embodiments of two-way communication devices and tracker devices are presented. Such a device may include a processing unit, comprising: a housing, one or more processors; a microphone, a speaker; and a first electrical connector for receiving power, wherein the one or more processors, the microphone, and the speaker are housed by the housing. Such a device may include a wristband that includes one or more integrated power sources that are permanently housed within the wristband. The one or more integrated power sources may have a second electrical connector to supply power to the processing unit when the processing unit is removably coupled with the wristband. The device may include a plurality of magnets to removably couple the processing unit with the wristband.