Made for those who favor function and style at once, the Jazzmaster Performer line offers a powerful sport-chic appearance. Powered by the H-31 automatic chronograph movement with 60 hours power reserve, this Jazzmaster Performer Automatic Chronograph features a 42mm stainless steel case accented by a sleek light blue dial and an assertive stainless steel bracelet.JAZZMASTER PERFORMERSport-chic timepieces built for any challenge.TIMELESS APPEALMade for those who favor function and style at once, the Jazzmaster Performer is ready for all of life's adventures.SELF-WINDINGWrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.SUPER-LUMINOVA®Super-LumiNova is a type of luminescent material applied to hands, dials and bezels to make them visible in the dark.STAINLESS STEEL CASEA highly resistant alloy composed of steel and chromium. It can be worked to resemble a precious metal. It is nearly impervious to rust, tarnish, and corrosion.SAPPHIRE CRYSTALSynthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark.NIVACHRON™ BALANCE SPRINGNivachron™ is an alloy used to produce balance spring to resist magnetic fields and improve accuracy. It reduces the effects of magnets, temperature, and shocks.TACHYMETERA tachymeter measures speed as a function of elapsed time over a fixed distance. It can convert time into average speed, making it useful for car racing or running activities.