iLive IAHB48MB Bluetooth Over-the-Ear Headphones with Microphone (Matte Black) Bluetooth(R) range: 33 ft., supports A2DP; Auto pairing; Rubberized coating for matte finish; Drivers: 40 mm; Frequency response: 20 Hz to 20 kHz; Impedance: 32 ohms; Sensitivity: 102 dB at 1 kHz SPL; Playback time at 50% power; On-ear controls--volume up, volume down, play/pause, pairing/phone answering/power; Voice prompts announce headphone operations; Aux input; LED pairing and LED power indicator; Built-in rechargeable Li-Poly battery; Micro USB battery recharge port; Up to 5 hours of playback time; Up to 2 hours for battery recharging; Includes 3.5 mm aux cable, micro USB to USB cable, warranty, and user's guide; Matte Black;