2019 Naviforce 9153 New Arrival: ?naviforce Watch Men Sports Quartz Watches Top Luxury Brand Stainless Steel Waterproof Led Digital Wristwatch Relogio Masculino item:naviforce Dual Display Original Men Watch watch Type:men Watch/digital Watch/led Watch/quartz Watch/outdoor Sports Watch/fashion Watch/relojio Masculino/montre Homme pefect For All Kind Of Business?casual?outdoor Sports?indoor Activities Or Daily Use. funtion Introduction: q1:how To Use Back Light Function :press The A Button In Any Mode To Light Up For Three Seconds. q2:how To Use The Stopwatch(1/100second) :stay The Stopwatch Interface;start And Stop With Button D;press Button D To Resert Stopwatch To Zero; Press Button C Back To Standard Time Display. q3:how To Use The Alarm Function a:alarm Clock And Hourly Chime Function On/off:under The Alarm Mode Press Button D To Turn The Alarm On Or Off In Turn And The Alarm Clock Chimes Every Hour Later.