LG - TONE Active HBS-850 Bluetooth Headset - Gray Blue Designed for use with LG K7 cell phones for simple connecting In-ear design fits securely and directs music into your ears for full, uninterrupted audio Bluetooth 4.1 interface enables simple wireless pairing with your Bluetooth-enabled device. Supports HFP, HSP, A2DP and AVRCP Bluetooth profiles Rechargeable battery provides up to 19 hours of talk time Sweat-resistant provides protection from sweat, so you can easily wear the headset while working out