Sound Tube with Receiver of V03B RIC Hearing Aids [https://chosgohearing.com/collections/ric-hearing-aids] The Sound Tube with Receiver fit for V03B It is a spiral installation method. Please refer to the videos for the installation method. 1、Align the female(hole) and male(pin) headers, then insert 2、There wll be a clicking sound when the connection is in place.