1 CABERG helmet & BlueTooth ( pairing with iPhone and others) 2 You can pair it with 10 helmet of the same type 3 You can make and receive local and international calls 4 You can use WhatsApp, Viper etc for free calls to stay connected during ride with other riders 5 You can listen to music from YouTube and other musical Apps 6 Auto reconnection with other helmets at the end of phone calls 7 Volume control ( + ) ( - ) 8 Size M 9 Convertible to jet model 10 Low noise distortion during live communications 11 Air ventilation ( front and top ) 12 Anti-Bacterial washable internal lining 13 Reinforced internal protective structures Note: A discount for a serious buyer