Type Ear coupling: In-ear (earbuds) Primary application: General listening Secondary application: General listening Operating principle: Closed Audio Frequency response (TX): 20Hz - 20kHz SPL: Not specified Driver diameter: 8.6 mm THD: Not specified Noise cancelling: No Comfort Weight: 16.5 g Cable Style: Not applicable Length: Not applicable Connector: Not applicable Built-in mic: YesDelivering signature JBL sound with up to 8 hours of battery life and a convenient neck clip, E25BT in-ear wireless headphones provide a comfortable and secure fit over extended periods of useYou can also seamlessly switch from music on your portable device to a call from your phone, so that you never miss a callYou’ll also appreciate the added convenience of a three-button remote and microphone for crystal clear phone conversationsThis refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box