Bluetooth wireless speaker. Ideal for use indoors or outdoors. Water proof, dirt proof, and drop proof. Unique design features speakers on both sides of the unit for 360-degree sound. Streams Bluetooth audio up to 100-feet away, or connects directly to the charging USB (universal serial bus) for up to 20 hours of playback on a single charge. Includes 2.75-inch drivers, built-in FM tuner, AUX jack, and charging USB connection. Compatible with Kicker Connect app that can control five-band equalizer, FM tuner with presets, volume control, display battery status, and more right from a smart phone.