MOTOROLA Bluetooth wireless headset HX550 [one year guarantee] with Black MOT-HX550 By mounting the inner ear pad accessory , possible to distinguish open-air , in the inner ear About 4.5 hours available rapid charging function in 10 minutes of charging Voice guidance to guide the various status ( English ) featured The possible communication up to 100m by the Bluetooth specification (Class1), communication equipment is also available if away