jump back VERSUS forth

Polyester

Senior Member
Joined
Apr 29, 2014
Member Type
Interested in Language
Native Language
Chinese
Home Country
China
Current Location
China
"You can pair the headphone with two devices at the same time and jump back and forth between them."


What do the both words underlined in red mean here?
 
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Rover_KE

Moderator
Staff member
Joined
Jun 20, 2010
Member Type
Retired English Teacher
Native Language
English
Home Country
England
Current Location
England
You can switch from one to the other.
What do the [STRIKE]both[/STRIKE] words [STRIKE]underlined[/STRIKE] in red mean here?
 
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