The Viper RS-V171 BL+ Flip Front Motorcycle Helmet was introduced to the Viper flip up helmet range as a mid range priced lid with a list of great features to make every ride as comfortable and enjoyable as possible. With a built in Bluetooth BL+ system and 2 high definition speakers, this helmet is able to connect to all previous Viper helmets along with Blinc1 & SP4 Systems. Plus the 400-800m Bluetooth range (depending on conditions) makes this helmet the ideal touring lid with all the spec you could possibly need on long rides including an internal drop down sun visor, high density noise reducing liner, and efficient aero-tech venting system.