Retekess T128-TD019 Restaurant Pager, Wireless Call SystemProduct Description Retekess T128 watch receiver needs to be paired with the TD019 transmitter before using it When they are paired successfully, just press the button, the indicator light outside the button will light up and the watch will vibrate light sound. This wireless calling system is more convenient and faster to use, which has been widely used in restaurants, bars, fast food restaurants, food courts, pizzerias, coffee shops, and hotels You