User Manual Nikon BKA127SA Coolshot 20 Golf Rangefinder

It's silent. The display is somewhat bright, but wouldn't be the best for dusk applications. It's more for golf, but may be used for archery since it is silent.

Yes, you could see the battery life through the lense.

It does not measure slope but accurate distances for the price.

It is a laser rangefinder. It gives precise distances from the lens to some object, usually an upright object like flagstick, a tree, or even a person on the green.

Yes, it comes in a strong nylon case similar to heavy duty backpack material. It also has an adjustable loop on the back that you could slip a D-ring into and attached it to your bag or if you wanted put it through your belt.

I am on vacation and do not have it with me but, no, the batteries are not rechargeable but is a standard camera battery. I have probably 20 rounds so far on battery and still have over 50% charge. I’m just going to replace at beginning of every season.