Bluedio 99A Bluetooth Stereo Headset for Mobile Phones - Retail Packaging - White 1.Take to speak, put down to charging. Bluedio 99A headset is equipped with charging base, put down your headset any time in the car to charge it, lift pressure of your ear. 2.Enjoy the real stereo music. Plug the headset cord of 100A in, clearer call, enjoy clear, balanced and sweet true stereo music, watching movies on mobile phones, computers without any problem. 3.Multipoint pairing99A supports two mobile phones connected via Bluetooth at the same time, it lets you never miss any important calls, closely your life. 4.Dual-mic noise reduction Such multi noisy environment, either at the roadside or karaoke room, can remove background noise effectively.(This product do not support active noise cancellation) 5.Dual-circuit protection When voltage or output current are not under normal operation, charging base of 99A will start protection, automatically cut off the power supply to ensure your safety.