Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Hi, how do you control the speed? (3 speeds) and is the speed variable speed in driver mode?
Document: There just isn't any more to say ! This Drill/Driver lives up to the Dewalt name and at a good price. With it's 1/2 inch chuck it has more than enough power, speed and features to handle any job at hand.
I cannot say enough about Li-on batteries! I have an old DeWalt drill with NiCad, and they only hold a charge for a day - max! The Li-on batteries hold a charge for many days and weeks! The light on the drill is awesome. The three speeds is perfect. The brake and power is well balanced - this whole drill is very well engineered! This is my newest favorite toy/tool.
I LOVE this drill. The power is GREAT. I haven't found anything it won't drive. I put some 3.5 inch screws in  a wood beam with a stainless steel backing plate that was an eighth inch thick, and it bent the plate when the screws bottomed, and it was still driving. The chuck is another great invention. No need to have to use 2 hands to try to tighten a drill bit. Just tightening with one hand works. The chuck won't turn when tightening it on a bit.
a must have for the serious handy man. All the power you want or need and the extended operation time is a must.
Wonderful product! Able to complete many household products with ease. Would recommend to anyone with a long Honey Do list.
The lithium batteries are just what I needed. I had NICAD batteries on the old drill, and I don't use it often, and they were always depleted when I went to use the drill. These hold a charge for 18 months. I have other tools with the lithium batteries, and they are always ready when I need them.
So far this drill has plenty of power and good battery life. Hopefully it will last as long (20 years) as the old Makita 9 volt I replaced with it.
Simply a GREAT cordless drill. Plenty of power, lots of battery run time, and the durability that you'd come to expect from Dewalt. Worth every penny imo.
Really like the feel of it and the power is next to none. The staying power of the batteries is unbelievable.
As with all DEWALT products...this one meets all of our expectations for a cordless drill, would highly recommend it for anyone in construction or involved in home improvement projects
Answer: yes