1) Remove the Ear Tip from the end of the speaker.
2) Line up and Insert the lock into the speaker with the tail pointed to the receiver assembly (as shown).
3) Slide the lock into the receiver (red or blue part) until it is about halfway down the receiver.
4) Replace the Ear Tip.
Using the Sport Lock with the iHEAR Device
To use, place the device in your ear normally. After inserting the ear tip/receiver assembly into your ear, take the tail on the lock and curl it back inside your ear as shown.