Wireless Powered Dual Speaker and Transmitter has built-in 250 watt amplifier and 16 Channel UHF receiver, two 6.5" NEO woofers & dynamic compression tweeter. It includes a Transmitter which connects to the line-out or record-out jack on the SW915 for a cordless link between the main PA and the Speaker within the 300 ft. reception range. Includes built-in rechargeable batteries and AC Power cord. All built into cabinet with handle and wheels. Use with SW915 sound system up to 300' away. No messy cables or wires. Built-in 250W amp and receiver. 2 built-in tweeters & woofer. Built-in rechargeable batteries & AC Power Cord. Built-in tripod mount. Includes transmitter. Extendible handle and wheels.