To insert head attachment: Gently push while slightly rotating your desired head attachment to the unit as shown in the video below.
To remove head attachment: Gently pull while twisting the head attachment until it is successfully removed.
Please note: DO NOT push the head in too far forcefully other than what is shown on the video guide as this may cause difficulty in removing/replacing the head which may cause malfunction and stuck attachment. If that's the case, this is not covered under HappyGun's warranty and return policy.
Warranty exclusion under Section k. improper/incorrect process of attaching/detaching massage heads causing stuck parts and/or damaged unit. For full warranty details, click here: https://happygun.com/pages/happygun-warranty