Basic specifications for the portable speaker shown in the picture from NEDA, model 155BTM: Sound Power: 350 Watts. Speaker Size (Woofer): 15 inches. Tweeter Size (High-Frequency Speaker): 51 mm. Supported Connectivity Systems: Bluetooth, USB port for playing flash memory, SD card slot, and AUX port. Microphones: Comes with 2 wireless handheld microphones with microphone priority feature. Additional Options: Supports FM radio, direct recording to USB feature, and includes a remote control for remote operation. Power Supply: Operates on 220V current (50/60 Hz). Design: Durable black body with side handles and built-in wheels for easy transport and carrying during parties, events, and schools.