THE NEWTONMovement: Chinese quartz with LED light and display. Case: Custom 30 meter molded polycarbonate with hardened mineral crystal. Band: One piece custom injected silicone with patented locking looper and plastic buckle.35 - 41 MM FROM 3 TO 9 O`CLOCK POSITION.U.S. PATENT #6,830,166. HOLDS DOWN THE EXTRA FLAP AT THE END OF THE BAND.CAN HANDLE SOME RAIN, SPLASHES, ETC.