The VEC-201K gives you the best electronic keyer bargain in ham radio. The VEC-201K CW Keyer Kit is the same as our VEC-221K without 128 character memory. It takes all of the work out of sending CW -- youll have a professional sounding fist in no time! The kit uses a 9 Volt battery (not included). Its sized at a super compact 2 x 3 x 3½ inches.