Reminder User Manual product will tum off when combined ; turn on when separated) #When separated , the receiver will sound one long beep and Combine status (Turn off) follows one long & ane short beeps, the LED on both receiver . side and transmitter side will flash synchronously, then you . Buzzer can begin to use they cannot flash synchronously, it means this tum on procedure is fail, please repeat this operation 1. Again! ). .