China Gym Clock suppliers A synchronized timer is more important now than ever before due to the recent surge in remote meetings and training. If you are in a giant commercial gym and looking to operate several timers聽simultaneously, then this one works well for you. Only have to select one timer聽as the master and then the remaining timers will be set as slaves as default. And when聽Sync time mode is not necessary, you can still use the timer individually.聽 And default聽 IR remote control is only available to control the master timer, salve timers can only get the signal from the master timer. Three Timer Modes on One Timer 聽Master timer: send a signal to slave timers for synchronization. Master timer works with remote control. Slave timer: only receive a signal from the master timer to keep synchronization. Slave timers will not work with remote control. 聽Independent timer: without any signal sending or receiving. It works with remote control individually How to Set Sync Groups Select one timer as the master timer by pressing the GREEN button on the right side of the timer. The new synchronization group will be聽set. Only have to operate on the master timer with IR remote control, other slave timers will be synchronized automatically. 聽To release current synchronization, press the GREEN button again on the right side of the master timer, all timers will back to independent timer mode. To release one of the slave timers from the current synchronization group, press the GREEN button directly on the slave timer. Timer Details Custom define size, function, and led colors, pls feel free to contact customer service to custom the synchronized timers. 聽聽聽聽聽聽China Gym Clock suppliers website:http://www.timingall.com/gym-clock/