Brand: Panasonic Model/PN: RB-HX220BEEK Type: Bluetooth over-ear headphones Headphone Connectivity Technology: Bluetooth Headphone Type: Over-Ear Microphone: Yes Driver/Speaker Diameter: 40 mm Frequency: 20 - 20 000 Hz Sensitivity: 97 dB Volume Control: Yes USB Q-ty: 1 Jack Q-ty: 1 Battery Description: 430 mAh Battery Life: Up to 23 hours Color: Black Weight: 197 g Warranty For Individual Customer: 24