The RJ-4030 is a mobile thermo printer for roll paper. The device is shockproof, water- and dust-proof. The printer is designed for heavy-duty outdoor use, e.g. by parcel services, where input and print-outs have to be made on the go. The control panel is developed to be of easy use, even when the printer is attached to the body. The oversized lever makes paper replacement with gloves a problem-free task. The device is easy to hold from any direction, while rubber-elements are additionally used to impact strength and weight reduction.