Coops Read the ITEM DESCRIPTION. What you are asking is listed there, as well as a lot of other information.

Coops it is rated 20 Amps. Of course it does not measure 30 or 40 or 50 ampere. if you read item description, you do not need to ask questions like this.

Coops The battery is 3 cells Li-ion, pack rated 12 Volts. The capacity will be about 1500 mAh, as these need to be High Current cells, not high capacity 3000 nah cells like used in laptop, etc.

Coops You can use it anywhere you choose! This product does not have any "Usage Lock" that prevents you from using it in ANY location. You can use it in your toilet, in the car, even inside a bird cage. So, why ask an unecessary question?

Coops Yes, the Item Title, description and photos all show "with air assist" compressor. Note this is the AP30x compressor, which runs from 110V or 220V and not the 12V Air used in the S30 which is powered by the engraver's 12V 7A power supply.

Coops This is not a laser. It is a motor that turns a tool like a twist drill or router bit that physically cuts the material.

Coops No, to cut deer antlers you need to use a saw. It can engrave (burn) into flat areas of antler. the surface must be flat within (say) 5mm because the laser needs to be focused at a single height thoughout each session. You can engrave cylindrical items (like a straight parallel section of antler, or a ceramic cup) by buying the rotating rollers accessory.

Coops 5W diode laser, they claim comparable to 100W CO2 laser