SERENE CA-DXH DOOR HANGER WITH DOOR KNOCKER SENSOR FOR CA-360 NOTIFICATION SYSTEM
Product # CA2010
Hang your CA-DXH on an inside doorknob & detect the vibrations from knocks on the door.
A wireless signal will be sent to the CA-360 or CA-RX (remote).
It is ideal for hotel room or bed room applications.
Safe and secure since there is no visible part outside the door.