40 Hours Long Battery Backup About This Item (Deal for the adventurous and extended travelers): No glitches or shutters while traveling as a 2-hour full charge gives you at least 40 hours of backup as this Bluetooth headset / The headphones are power packed with a 3.7V battery which provides you with long battery life as well as cycles. Incoming Call Vibration Alerts (For Riders, Multitaskers, Sports Persons, Gym, and Office People): Powerful Vibration Alerts with our “Bluetooth Headphone/Headset with Mic” to alert you to every call and call back even when your phone is away Makes it convenient for you to participate in. Without you physically operating your phone. Feather-light weighted full flexible silicone body (Super comfy and ideal for even rough use: Headset weighted in your neck, Makes it Attractive and Inconvenient for Users, Power Pact Bass and Stereo Audio: (For Music Lovers): Music lovers feel the beats and enjoy music at their sight with this robust wireless Bluetooth earphone, better-calling experience In-Line Remote for (Students, Bloggers, YouTubers, Online Classes & Meetings): Powered with superior calling mic for excellent calling experience, it gives you the utmost pleasure and noisy-meeting, recording or attending online classes Sounds for free.