Specification (approx): - Diameter: 4.5cm - Thickness: 1.6cm - Length of watch band: 24.0cm - Band width: 2.5cm - Movement: Self-winding Mechanical - Watch band: Genuine leather strap - Watch case: Stainless steel Package includes: - 1 x Mechanical watch - 1* GMT Cardboard Gift Box Suggestions of using mechanical watches: 1. the manual winding movement of the watch should be lopped once a day at the same time, to ensure there is enough energy to operate the watch within the next 24 hours. 2. Automatic movement of the watch, the energy from the movement of the wearer 's arm. So you don''t need to manual winding the watch under the normal case. It may need to manual winding because of wearer' Physical-activity energy is not enough to operate the watch. Please take a control that turn the crown less than 20 laps. 3. Having not been worn more than 40 hours of automatic watch, should turn the crown 20 laps to re-start the movement of drive system before wearing again 4. To prevent to ingress of the moisture to the watch case and keep waterproof performance, make sure the crown is always in a locked state. 5. Please let the watch keep any from the magnet devices such as TVs, Computers, Celephones ... For more information, please read the product instruction manual