I don't repair clocks

This woman is visiting in Israel and notices that her little travel alarm needs a battery. She looks for a watch repair shop and while she doesn't read Hebrew, she finally sees a shop with clocks and watches in the window.

She goes in and hands the man her clock. The man says, "Madam, I don't repair clocks. I am a Mohel. I do circumcisions." She says, "Why all the clocks in the window?" And he says, "And what should I have in my window?"