Heath Zenith SL-6140 Wireless Battery Operated Door Chime Kit - White A Lefty If you can identify who

If you can identify who made this let me know

San Francisco

and also no sound

Rear paper has never been cut open

Barrel DIA

Heath Zenith SL-6140 Wireless Battery Operated Door Chime Kit - White A Lefty If you can identify whoPickup Only, or request ship cost, if not available in the calculated shipping. Heath Zenith Wireless Portable Chime Kit Two Unique Notes 100 Ft Range Doorbell LBS 0. 45 Length 9x7x2 Package 016963614000 Sealed, Battery Untested and battery is AS IS. Heath Zenith SL 6140 Wireless Battery Operated Door Chime Kit includes a battery operated receiver and one battery operated push button (push button battery included AS IS) with up to 100 Feet