DryBuddy 2 Wireless Sensor only without its "cap" or briefs. This sensor can only be used as part of the DryBuddy 2 system. Please synchronize the Receiver being used with this Sensor, following the instructions provided with the complete DryBuddy 2 system. When used with a DryBuddy 2 Receiver, the transmission distance between the Sensor and Receiver can be up to 72 Ft. (22 m.). Ninety (90) days limited warranty. Instructions are available on www.DryBuddy.com. Free shipping available (domestic U.S. only) by First Class U.S. mail (uninsured).