Jeremy Jolleywrote a review of ARVA Evo4 Beacon on February 24, 2016
Familiarity: I've used it several times
If you are using and old beacon, possibly with 2-Antennas, or does not feature marking you should check out the Evo4 as an upgrade. At this time it is the least expensive beacon that features TRUE multiple victim display and marking for 3+ victims. Lots of bang for your buck... Plus Arva stands behind the product with a 5 year warranty.