Almost Silent and Professional quality, powerful 25.2 Volt brushless motor with a removable 6(six) cell 2400 mAh 18650 battery pack.

Wow. Extremly impressed with this unit. 

I've been playing around with this gun for a while, and wanted to leave a review based on my experience with this one and a few others. For the price, this is a great buy. It's got a few things going for it which I like:

1. It's VERY quiet. 
2. The motor is Brushless so it could last forever.
3. The unit only mentions 18650(2400mAh)rechargeable Lithium battery but it's much much better than that. It uses 6 (Six) 2400mAh 18650 batteries in it's pack and the pack can be removed. The voltage is 25.2 Volts so alowing it to have more power than you need with it's 20 power settings.  
4. Very easy to switch speeds, theres a button right by your index, useful when you want to find the right speed for whatever part youre working on
5. The unit's battery can easily be detached and you could buy a second pack if your a professonal with many clients. 
6. The unit comes with a very high quality case 
7. It gets to be pretty powerful, much more than what you'll need most times. I only use settings 1-5 most of the time as setting 20 is very powerful.
8 It has a great grip, so I dont get tired working on someone with this for a while


I'd recommend this gun for the price, it's a solid buy. Quick customer service too, I had a question answered within a couple of hours so that's a plus.