Used with SW800 Titan Wireless Portable PA System (optional speaker transmitter - S1692T must be installed). The SC800 has a built-in 100 watt amplifier and wireless receiver with 8" bass speaker and a 4" tweeter. Wireless receiver works within the 300 ft. reception range of speaker transmitter in the SW800. Built-in rechargeable batteries and AC Power cord. All built into cabinet with handle and wheels.