Type: LED Display: LED Display Band Material: Plastic Strap Case Material:Stainless steel Surface Material: Glass surface Clasp: Stainless steel Features: Time/Week/Date Adjustable LED brightness Timing function， can setting in default time interval automatic LED lighting on ON/OFF setting automatic LED lighting function Battery Brand:3V battery For the crowd:Men Specification: Fit Wrist: Approx17 - 22 cm watch glass Size: Approx 2.8*3.1 cm Watch case Size: Approx4*3.8 cm Watch thick:Approx1.1cm Watch Width: Approx2.3 cm Strap thickness:Approx0.3cm Weight: Approx75g