Introducing this incredible watch with a very rare movement: Hybrid Automatic Equipped with an EPSON PX82A movement this is an analogue quartz watch equipped with an Automatic power generating system. It generates the electric energy to power the watch, utilizing the movement of the arm, and stores it in the rechargeable unit. Unlike conventional quartz watches,his watch does not use a silver oxide battery, thus eliminating the need for battery replacement. SPECS: Movement: EPSON PX82A Hybrid Automatic Power reserve: 6 Months with Maximum Charge Frequency : 32768 Jewels: 6 Diameter: 42 mm Case Thickness : 11 mm Material: Stainless steel Back case: Screwed case back (Stainless steel & glass) Crown: Pull crown Bezel Material: Stainless steel with aluminum insert Rotating Bezel: Uni-directional Strap material: Stainless steel Strap Type: Link bracelet Strap width: 20 mm Lug width : 20 mm Strap width at the clasp: 18 mm Clasp Type: Deployment clasp with push buttons Suitable for wrist size: 160 mm - 210 mm Water Resistant: 10 Bar Warranty: 1 year seller warranty MANUAL: To avoid wasting paper, there is no manual included in the case, but you can consult or download it at the following link: https://www2.epson.com.hk/wmfiles/Operation-Manual/px82a.pdf