mens watch chronograph 49mm motion yellow rubber stap black case luminous quartz screw crown wristwatch, Slivery;brown

surface size 49mm (due to different measurement methods, there may be different results, not as a reason for disputes) multi-functional watch ring. the outer rubber ring can rotate directly. the steel watch ring needs to be pulled up before it can rotate screw button and crown, need to turn counterclockwise to open before use all three small dials will work. after pressing the time code, the first small dial is the minute dial, and the second is the hour dial (the movement can be seen in about half an hour). at the bottom is the small second hand dial the blue dot on the silver case and crown is a protective film, only for protection, not the color of the watch.syi