[Unclenick]

The CED M2's optional infrared screen accessory works great. There is an optional rechargeable battery back available for it if you can't plug the wall adapter in at your range. I've done a lot of airgun pellet measuring in my basement with my copy and not a single false trigger event has occurred. I have light on the target and low light at the firing point, so the voice feature of the M2 actually becomes useful in that circumstance. Some folks use the artificial light and a shade even on outdoor ranges to be sure the light level is consistent.

Whatever unit you get, you'll want their artificial lighting system. Fluorescent lights can cause false triggering, so you may need a light shade over everything if your range has them. You can cut one out of cardboard. Just be sure your tripod is sturdy enough for the weight you want to put on it.