Hunter Sprinkler WSSSEN Wireless Solar Sync for Use with I-Core, ACC, X-Core, PC400 and PC-400i Controllers For use with Hunter controllers in which the Solar Sync programming is already built in, such as Hunter X-Core, PC-400, I-Core 3.0 controllers (module not required for X-Core, I-Core 3.0, PC-400, PC-400i and ACC controllers). Rain and Freeze sensor shutdown capability included in sensor. Maximum distance sensor to module: 800 ft. (wireless model). Warranty period: 5 years (10 year battery warranty for wireless model). Smart irrigation control made simple!