Otto TW100 - Earbud Control Functions

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Pause: Press either multi-function button
Play: Press either multi-function button
Next track: Press twice on the multi-function button of left
earbud
Previous track: Press twice on the multi-function button of
right earbud
Volume up: Long press on the multi-function button of left
earbud and a beep tone will confirm one level up
Volume down: Long press on the multi-function button of
right earbud and a beep tone will confirm one level down
Call up assistance: Press three times on the multi-function
button on either one of earbuds
Answer call: Press either one of multi-function button once*
Reject call: Press and hold either one of multi-function button
Hang up call: Press either one of multi-function button once
Earbuds functions