Acoustic Research Indoor/Outdoor Wireless Speaker (AW811)                                                                                                                 

Listen to music on your patio or while working in your garden. These wireless speakers are water-resistant and feature omnidirectional sound that's a perfect solution for outdoors use. Water-resistant design for use outdoors and in humid indoor areas, such as kitchens and baths

Indoor/outdoor:                    

Plug in the wireless transmitter and take the speaker where ever you want to listen to your music. Enjoy it by the pool, while gardening, or anywhere in your house. The weather-resistant design withstands wet conditions and even humidity.

Wireless technology:

With the touch of a button you can enjoy your favorite tunes anywhere. The 900MHz wireless technology transmits audio signals through walls, floors, and ceilings up to 300 feet. With a built-in folding handle and non-skid surface, this speaker is designed to go where you want it.

Quality sound:

The 20-watt speaker features a 1" dome tweeter for extended upper frequency response and a 5" woofer for deep bass output. To help eliminate extra noise, the speaker comes with a RF noise reduction system.

Controls & power:

Control everything, from power to tuning to volume, with one easy knob. The speaker runs on either eight C batteries (not included) or an AC adapter. The batteries self-charge when the unit is plugged in.

Compatibility:

You can even take the speaker inside and use it with any RCA-compatible device, such as your TV, DVD player, A/V receiver, VCR, portable CD player, computer, and more.