Voice prompts: Once you're connected, voice prompts alert you with battery status updates, mute status and more. So you always know what's going on. Automatic volume control: Walk into a noisy environment, and your headset adjusts the volume almost instantly, so you can concentrate on your call. Rapid charging: With just 15 minutes of charging, the headset gives you up to 2 hours of talk time. So whatever you're doing, you've got a headset that's good to go. Designed for you: The headset is small, simple to use and affordable - which makes it convenient for everything you do each day. Superfast Charging, just 15 minutes for a full cycle charge 2 hours of non-stop talk time before next charge very tiny, light weight available voice prompt automatic voice control adjusts to surrounding noise Bluetooth 2.1 for simplified pairing Bluetooth HFP Bluetooth profile Dedicated on/off switch 4 hours of talk time with a full charge 2 hours of talk time with a 15-minute charge Micro-USB standard c Type: Bluetooth Headset Compatible Phone Manufacturer: Universal