Compact, portable party speaker with built-in battery. Power: 300 W (maximum), frequency response: 50 Hz - 18 kHz, 8-inch driver. Power supply: 3.7 V battery, 1.5 Ah, USB port 5 V. MP3 player with USB port and micro SD card slot, Bluetooth connectivity. 3.5 mm AUX jack, microphone input with echo effect. Color-changing LED light ring, integrated stand mount, trolley system with retractable handle and wheels. Includes wired microphone and remote control. With the FT8LED-MK2 Portable Sound System, the party can begin. This entertainment system allows you to play all your favorite songs and sing along with the included microphone wherever you want. The speaker is equipped with a trolley system and features an 8-inch woofer for optimal sound. Use the wireless Bluetooth connection to pair it with your smartphone, use a microSD card/USB stick, or connect a 3.5 mm audio cable to your device when a wireless connection is not available. The built-in color-changing LED ring behind the grill creates a great effect at any party. This portable speaker system has a built-in battery and is easy to use.