A portable electronic data logging device comprising: electronics for sensing an environmental input and storing data relating to the environmental input over a timescale; a tethered communications interface comprising a cable and a plug to permit electronic communication of the data from the electronics to an external computer system; a housing for enclosing the electronics, the housing comprising: an electronics compartment in which the electronics are stored, the electronics compartment having an opening to permit the tethered communications interface to extend from the electronics compartment; and an outer casing (14,16) having an outer perimeter extending at least partially beyond the electronics compartment to form a channel into which the cable of the tethered communication interface can be stowed; and a slide area for receiving the plug, wherein the plug comprises a ridged grip configured to extend past recessed edges (102, 108) of the outer casing (14, 16) and to extend beyond the outer perimeter of the outer casing (14, 16), when the plug is stowed via the slide area; whereby the tethered communication interface can be stowed when not in use such that aside from grip it does not extend beyond the outer perimeter of the outer casing. electronics for sensing an environmental input and storing data relating to the environmental input over a timescale; a tethered communications interface comprising a cable and a plug to permit electronic communication of the data from the electronics to an external computer system; a housing for enclosing the electronics, the housing comprising: an electronics compartment in which the electronics are stored, the electronics compartment having an opening to permit the tethered communications interface to extend from the electronics compartment; and an outer casing (14,16) having an outer perimeter extending at least partially beyond the electronics compartment to form a channel into which the cable of the tethered communication interface can be stowed; and a slide area for receiving the plug, wherein the plug comprises a ridged grip configured to extend past recessed edges (102, 108) of the outer casing (14, 16) and to extend beyond the outer perimeter of the outer casing (14, 16), when the plug is stowed via the slide area; whereby the tethered communication interface can be stowed when not in use such that aside from grip it does not extend beyond the outer perimeter of the outer casing. an electronics compartment in which the electronics are stored, the electronics compartment having an opening to permit the tethered communications interface to extend from the electronics compartment; and an outer casing (14,16) having an outer perimeter extending at least partially beyond the electronics compartment to form a channel into which the cable of the tethered communication interface can be stowed; and a slide area for receiving the plug, wherein the plug comprises a ridged grip configured to extend past recessed edges (102, 108) of the outer casing (14, 16) and to extend beyond the outer perimeter of the outer casing (14, 16), when the plug is stowed via the slide area; whereby the tethered communication interface can be stowed when not in use such that aside from grip it does not extend beyond the outer perimeter of the outer casing.