Air 2 CSBT-311-BLK Wireless Floating Sound 4.0 Bluetooth HD Speaker (Black) 2015 Best of Innovation - CES Innovation Awards The Air2's speaker and base are each fitted with magnets that repel one another, causing the speaker to hover over the base-so you can listen to "Float On" (or "Miracles," if that's your thing) and marvel at magnetic levitation at the same time. Levitates to Provide Acoustic Sound - Built-in microphone for hands-free phone calling and Easy to pair as well Built-in Li-Ion Rechargeable Battery for up to 12 hours of playtime. Supports Wireless Music Streaming via New Bluetooth v4.0 Technology.