Bluetooth v3.0 Wireless Headphones The August EP634 combine comfort, quality and retro design with a superior sound quality. They are designed to make your music sound better, delivering deep and clear sounds for all your tunes. The 20mm ear piece cushions and coupled with the adjustable softly padded headband provide superior comfort. Connection via its Bluetooth technology 3.0 is made simple, you"ll have them connected in seconds without tangles! Microphone and Touch Controls The touch panel on the right earpiece allows you to skip back and forth through your track list, answer calls and hang up; all at your fingertips. As a micris included, you"ll also be able to sit back and relax knowing that any calls can be answered without having to find your phone. The mic can also be used with software like Skype giving you a hands-free headset for internet calling or PC gaming. Internal Battery - For 16 Hours of Freedom The battery provides up to 16 hours of runtime between charges, and a 3.5mm line in socket allows you to continue listening for as long as your playlist is. You can also use it to connect to MP3 players or computers that haven"t a Bluetooth connection and recharge it with the included USB cable. In the Box: August EP634 headphones USB charging cable 3.5mm audio cable User manual Specifications: Speaker: 40mm Frequency range: 20Hz~20kHz Sensitivity: 1KHz 110+/-5 dB Bluetooth: 3.0 + EDR Bluetooth Profile: A2DP, HSP, HFP Transmission: 2.4G?2.48G Wireless range: up to 30ftbr> Battery life: 16 hours Charging time: 2 hours Battery: Li-ion 400mha 3.7V Weight: 165g Dimensions: 190*160*65mm