Bluetooth wireless speaker: Plays music up to 50-Feet away from your Bluetooth-enabled Smartphone or tablet. Multi-person access: You and a friend can take turns playing music from your Bluetooth devices at the same time. Ultimate Ears Sound Signature: Two full-range drivers and a passive radiator deliver clear, big, perfectly tuned sound. Doubles as a speakerphone: Built-in microphone for hands-free calls in the office, car, house or anywhere. Ultra-portable: Compact design and 10-hour rechargeable battery make it easy to roam with your music The Logitech UE Mobile Boombox is a Bluetooth speaker that plays music wirelessly from your Smartphone or tablet and can double as a speakerphone for voice and video calls.