HUAWEI Portable Stereo Bluetooth Speaker - Blue Dual speakers deliver full-range stereo sound, with DSP noise-reduction technology Supports Bluetooth wireless streaming, an Auxiliary Jack for a wired connection (for non-Bluetooth devices), and microSD card slot provides another option as an audio sources Intelligent voice prompts for hearing and replying to messages; Dedicated phone button with built-in microphone for hands-free voice calls Professional acoustic system with premium sound quality Built-in 1200mAh battery allows for easy portability; LED indicator shows when the battery level is at 25%, 50%, 75% and 100%