Buy.com has Audio Unlimited 2.4GHz Wireless In/Outdoor Stereo Speaker w/remote & SRS WOW 3D Surround Technology - SPK-24G for $123.08 + free shipping.
Audio Unlimited's 2.4Ghz Wireless Indoor/Outdoor Stereo Speaker system with Remote allows you to enjoy your music almost anywhere without running unsightly cable. This compact speaker is powered by 2.4GHz technology, which guarantees a strong, clear signal up to 150FT away. The transmitter delivers a powerful signal through walls or any other obstacles in your home or yard, truly offering endless installation options. Just plug in your iPod, computer, stereo, MP3 player or any other device that has a 3.5mm or RCA audio output and enjoy high quality music wherever you want.
Features
2.4GHz Frequency Hopping Spread Spectrum (FHSS) digital transmission
32-Channel scan-tuning between transmitter and receiver
Audio output power up to 20 Watts RMS per channel
SRS WOW provides deep, rich bass and creates a 3D surround effect to provide a superior audio experience
Weather-resistant speaker and remote control
Waterproof at IPX-3 protect against spraying water
Mood light effect
Dual weather-resistant speaker driver (super bass and tweeter built-in)
UV resistant speaker and remote control
Supports stereo audio (with optional additional speaker)
AUX In jack
Operating distance up to approximately 50 meters/150+ feet in open areas (less through
walls and other obstructions)
Works through walls, floors and anywhere in the room
Virtually interference-free stereo quality
Auto volume level control
Remote control unit
Powered by 6 D batteries (not included), or by included AC adapter
Audio Unlimited 2.4GHz Wireless In/Outdoor Stereo Speaker $124.08 FS 
