A:
The Sony ICF-C707 Clock Radio unit does not have an Earphone jack. However, it has a built-in audio cable with stereo-mini plug (3.5 mm). You can connect the built-in audio cable with the stereo-mini plug on the bottom of the Clock Radio to the line output jack or headphones jack on the optional component (e.g., portable music player).
It has a Sleep Timer mode which can be set with time intervals of 90, 60, 30 and 15 minutes.