About this item Easy Connection - Connects via Bluetooth, NFC or 3.5mm stereo AUX input cable. You can also insert a Micro SD card, MD3 will automatically play music from it Compact Size - Only 1 lb, 3.5” long - Take it with you from room to room and share your sound anywhere—like the beach, park, hotel, backyard, rooftop, hot tub, or pool. The rubber strap make it easier to carry around, and you can even hang it on a tree or on your bicycle. Powerful Hi-Fi Sound - Enjoy soaring highs and deep, booming bass in every room of the house. The newly designed passive radiator provides strong bass without distortion even at highest volume. MD3 reveals rich layers of audio that you can sense all around you. Turn it on and immerse yourself in 3D sound. 12 Hours Play Time - With a 2200mAh built-in rechargeable battery that last up to 12 hours in a single charge, you can party all day or night at anywhere. Use Bluetooth devices to control MD3 from across the room, or use the buttons on top to pause, play, and skip Build In Microphone - Let you enjoy hands-free calls and video chats using Skype, GoogleTalk, and FaceTime. Whether you’re in a conference room or cooking in the kitchen, your conversations will come through loud, crisp, and clear.