Alpino Wireless Bluetooth 3.0 Stereo Headset with Built in Microphone- Extra Bass Adjustable And Foldable Headband, 3.5mm Audio Jack Enables Wired Audio Input, Built-In Rechargeable Lithium Ion Battery , Range of frequency: 2.4 to 2.48GHZ ISM band , Up To 10 Metre Range-Blue, Retail Box, 1 year Limit warranty