Early beginner level or Level 5 of Japanese Language Proficiency Test (JLPT) have roughly 400 to 1,500 characters per book. These books use the same 350 word vocabulary as Level 0 and です and ます endings. Early beginner books als feature the same vocabulary and grammar as Level 0 in longer stories.
present form, past form, interrogative, ～たい, etc.
※ です and ます endings.