"Handset" Natural Recordings by Native Speakers
A handset is a type of telephone or phone device, typically a mobile phone or a cordless phone, which is held in the hand to make and receive calls.
In informal or poetic language, "handsbreadth" is an archaic or poetic way of saying "about the width of one's hand". It refers to a short distance or a small extent, roughly the width of the palm of one's hand (about 7-10 cm or 3-4 inches).