The unique Roland BA-55 provides self-contained, high-quality, and battery-powered sound reinforcement for any environment. It's solidly built yet lightweight, and comes bundled with a matching wireless microphone for public speaking, singing, and many other events. Use the Roland BA-55 as a small wireless PA system in school classrooms, business meetings, restaurants, weddings, intimate music venues, and more. In a cool and convenient twist, the Roland BA-55 contains an internal accelerometer sensor that automatically switches operation between stereo output (when positioned horizontally) and mono output (when positioned vertically). If you're speaking and need maximum power and projection, use the vertical mono mode. For wide musical spread, turn horizontal. It's that easy!

Roland BA-55 Features:

1. - Portable design with high-quality sound for audiences up to 80 people
2. - SPL (sound pressure level) rated at a powerful 108 dB
3. - One 2.4 GHz wireless microphone included (DR-WM55); a second DR-WM55 can be purchased separately for simultaneous use
4. - Operates on 8 AA batteries or AC power (AC adaptor included)
5. - Onboard accelerometer sensor switches operation to stereo mode when positioned horizontally
6. - Two 6.5" (16 cm) high-performance speakers
7. - Three-channel built-in mixer with two-band EQ
8. - Echo/Reverb effect
9. - Built-in Anti-Feedback function
10. - Line Output for recording or expanding the system
11. - Integrated storage compartment for storing wireless microphones and accessories
12. - Auto Power Off function
13. - Compatible with Roland ST-A95 speaker stand