Baseus A01 is a single stereo Bluetooth headset with special in-ear hook design. Made of premium materials with soft silicone earbud tip and skin-friendly ABS shell. Comfortably fits with your ear canal and offers amazing sound quality. Thanks to the wide range (20 – 20KHz) and advanced Bluetooth V4.1 chip, a sound is clear and pure. Also, headset feature noise canceling technology, iOS power level display, connection with 2 mobiles at the same time (you can freely switch between them).Detail: Bluetooth4.1 Version, Wide Compatibility, It Could Build More Faster Connection AndTransmit Stable Signal In High Speed. Simultaneous Connection, This SpeakerCould Be Connected With Two Bluetooth Devices At The Same Time. NoiseReduction, It Could Reduce The Interference From The Environment Noise, ProvideYou High Clear Phone Call.Ergonomic Design, Equipped With Soft Earmuffs, MoreComfortable For Long Time Wearing, Suitable For Sport.Small Size AndLightweight, Portable, Easy To Carry Around, Provide Full Sense Of SecurityWhile Driving