I tested the First Alert Onelink and the Kidde Wireless System side by side for range. I was able to get over 300 feet. The Kidde system is older and is a direct radio link. The First Alert system can 'hop' from detector to detector, so you can form a chain of units each 300 feet apart. Just get two or more units and they talk to each other.
Or: if you get a hardwire unit, you can use the interconnect wire to trigger just about anything (e.g. a garage door opener, siren, radio, alarm system, etc).
Or: get a BRK HD6135FB heat detector (no problem with cold weather or condensation!) and wire it to a OneLink alarm. If the HD6135FB goes off, it activates the OneLink, which relays the message to all linked alarms.