- Brand: PRO TREK - Model: PRW-3500 - Color: Black - Functions: Digital display, compass, thermometer, altitude, etc. - Radio-controlled, solar-powered Condition: Working (Selling because I bought an Apple Watch) Includes only the watch and box, no instruction manual. [Other] Please check the condition of the product in the attached photos. (Returns are not accepted due to areas not shown in the photos or for scratches and stains) Radio-controlled and solar-powered, so time adjustment and battery replacement are unnecessary, and it can still be used for a long time. This is a used item, so please refrain from purchasing if you are sensitive to such things.