* Don't get caught off com headset because you missed call light! * Create a com call light unique to you using any USB device: LED lights, plasma ball, light box, moving objects, etc * Popular with churches & theatres * Only for use with Clear-com(tm) intercom & compatibles "So far I have already used both products I have received. I am extremely happy with both. They are well built, simple and seem reliable. Thank you." - Brian James, Christiansburg VA (USB Call Alert & Intercom Interface) Product details: * Hook up to the 3 pin XLR party line same as a beltpack * Comes with 2 amp power adapter for the USB device (2.1mm ID 5.5mm OD center pin positive. Relay can take up to 5 amps) * Compatible w/ single channel Clear-Com(tm) brand party line intercom systems ONLY. Should work with compatibles. * Bypass switch on left turns on the USB outlet full time as needed Full info on our website https://avlifesavers.com/usbcall.htm