A wearable device assembly comprising: a wristband; and a device having a USB connector and a housing; wherein the device has a controller having athletic functionality, and the controller is in communication with a sensor and is configured to communicate athletic performance data received from the sensor; wherein the wristband having a central portion between a first end portion and a second end portion, the second end portion having a plurality of holes, the central portion having an aperture and a protective sleeve with an opening; the device having a protrusion removably received in the aperture to connect the device to the wristband and the USB connector being received by the protective sleeve through the opening; characterized by: the first end portion having a pair of holes; the housing having a first member formed from injection molded plastic and a second member formed from injection molded plastic; the second member having a peripheral groove, wherein the first member is connected to the second member at the peripheral groove, the housing further having a first push button configured to cooperate with the controller, wherein the first push button is co-molded with the first member, the housing further having a second push button configured to cooperate with the controller, wherein the second push button has an actuator post extending therefrom and through a side opening of the housing, wherein the actuator post has an annular groove around a periphery of the actuator post and a sealing member positioned in the annular groove; and a removable closure having a plate member having indicia thereon and a pair of posts extending from the plate member, wherein the pair of posts is received in the pair of holes of the first end portion and further received in respective holes of the plurality of holes of the second end portion to fasten the first end portion with the second end portion. a wristband; and a device having a USB connector and a housing; wherein the device has a controller having athletic functionality, and the controller is in communication with a sensor and is configured to communicate athletic performance data received from the sensor; wherein the wristband having a central portion between a first end portion and a second end portion, the second end portion having a plurality of holes, the central portion having an aperture and a protective sleeve with an opening; the device having a protrusion removably received in the aperture to connect the device to the wristband and the USB connector being received by the protective sleeve through the opening; characterized by: the first end portion having a pair of holes; the housing having a first member formed from injection molded plastic and a second member formed from injection molded plastic; the second member having a peripheral groove, wherein the first member is connected to the second member at the peripheral groove, the housing further having a first push button configured to cooperate with the controller, wherein the first push button is co-molded with the first member, the housing further having a second push button configured to cooperate with the controller, wherein the second push button has an actuator post extending therefrom and through a side opening of the housing, wherein the actuator post has an annular groove around a periphery of the actuator post and a sealing member positioned in the annular groove; and a removable closure having a plate member having indicia thereon and a pair of posts extending from the plate member, wherein the pair of posts is received in the pair of holes of the first end portion and further received in respective holes of the plurality of holes of the second end portion to fasten the first end portion with the second end portion. the first end portion having a pair of holes; the housing having a first member formed from injection molded plastic and a second member formed from injection molded plastic; the second member having a peripheral groove, wherein the first member is connected to the second member at the peripheral groove, the housing further having a first push button configured to cooperate with the controller, wherein the first push button is co-molded with the first member, the housing further having a second push button configured to cooperate with the controller, wherein the second push button has an actuator post extending therefrom and through a side opening of the housing, wherein the actuator post has an annular groove around a periphery of the actuator post and a sealing member positioned in the annular groove; and a removable closure having a plate member having indicia thereon and a pair of posts extending from the plate member, wherein the pair of posts is received in the pair of holes of the first end portion and further received in respective holes of the plurality of holes of the second end portion to fasten the first end portion with the second end portion.