By STEPHEN C. MILLER NYTimes.com Handspring has done something about the confusing array of hand-held computers on the market: they’ve added to it. The company has announced two new Visor hand-helds, one aimed at the high-end business user and the other at the entry-level consumer. The standard Visor Pro comes with 16 megabytes of RAM (up from 8 megabytes for most high-end Visors) and a 33-megahertz Motorola (news/quote) Dragonball chip that offers double the speed of earlier models. The Visor Pro also uses a rechargeable battery instead of AAA’s. Handspring says that a charge will last several weeks with normal use (vendorese for your mileage may vary). The Visor Pro has a retail price of $299 and is available at www.handspring.com and in stores. The entry-level Visor Neo, which stands for Neon, not the character from “The Matrix” comes in three colors: smoke, red and blue. It has 8 megabytes of RAM and uses AAA batteries but has the same expansion capability as the high-end models and uses the Dragonball chip. It sells for $199.