[Note: This is an abreviated version of a longer teshuvah on the same topic]
Can I shave with an electric shaver and are all models permissible?
In two separate verses, the Torah prohibits men to shave their beards. In parashat Kedoshim, the Torah states: “You shall not destroy (tashchit) the corners of your beards,” (Vayikra 19:27). Two chapters later, in parashat Emor, addressing the male Kohanim, the Torah states: “The corners of their beards they shall not shave (yigaleichu),” (Vayikra 21:5). The Talmud (Makkot 21a) states that these two verses are not two separate prohibitions, one for Kohanim and one for all male Jews,