Stream music wirelessly via Bluetooth to enjoy room-filling sound. Built-in rechargeable Li-ion battery supports up to 8 hours of playtime and charges your smartphones and tablets via USB. Dual Microphone Conferencing System with Harman noise and echo cancelling technology delivers crystal clear conference calls. Wirelessly connect two Harman Kardon Wireless Dual Sound enabled speakers together to elevate your music listening experience. Premium fabric finishing and stainless-steel handle.