Completely weatherproof for use indoors and out! They operate up to 45m (150') away from the transmitter, and can be used for listening to your stereo, TV, VCR, DVD, just about anything that emits sound! With a rear channel amplifier for robust, clear sound. It even has an ON/OFF control.

http://www.thesource.ca/estore/produ...roduct=4015004