The helmet comes in two shell sizes

With its modular design

y ha sido diseñada para ofrecer un ajuste superior en una amplia gama de tallas (de XS a 2XL)

The C91N is also ready to incorporate the HJC 10B or 20B Bluetooth Smart communication systems (sold separately)

SENA Backplate for Speaker Microphone Clamp Unit Casco abierto The helmet comes in twoThe SENA SMH A0202 backplate is a replacement part designed for the speaker and microphone mounting unit of certain SENA Bluetooth headsets. It ensures a secure and stable attachment to your headset, maintaining the reliability of your communication system. The package includes an Allen wrench and two screws for easy installation. Compatible with models such as the SMH10, SMH10R, SMH5, and SMH5 FM, this backplate is an essential accessory for users