The UC-261 acoustic indicator communicates wirelessly with the control panel (two way communication). It can be used as a wireless indoor siren, a melody doorbell or as a chime. The UC-261 is compatible with Jablotron wireless control panels (JA-63 and JA-65), JA-60 wireless detectors and RC-40, RC-22 and RC 28 remote controls. Several triggering devices can be used simultaneously and different melodies can be assigned to each device. Two different sound levels can be selected. The UC-261 can also provide entrance and exit delay chirps when used with a control panel. In addition if the UC-261 is disconnected from the power it will send an error report to the control panel.