GET THE PARTY STARTED! - The Kicker Bullfrog BF100s unique driver design gives you speakers on both sides of the unit for 360 degree sound. On each side of the Bullfrog BF100 there is a 1-5/8 full-range driver and a 2-5/8 passive bass radiator. The two 1-5/8" full-range drivers are powered by a built-in 16-watt amplifier for great sound and the two 2-5/8 passive bass radiators provide enhanced bass response and improves overall sound quality of music and vocals. BLUETOOTH AUDIO AND ANSWER PHONE CALLS-The Kicker Bullfrog BF100 offers built-in Bluetooth as well as a built-in speakerphone and mic, so you can stream stored music and answer phone calls from your, Smart phone, laptop, computer; perfect for home, dorm room, kitchen, bathroom, golf cart. You'll even be able to control basic music playback functions such as Play/Pause & Previous/Next Track from the Bullfrog BF100