Sena SMH5-A0311 Helmet Clamp Kit with Locking-Type Connector and Attachable Boom Microphone for SMH5 Bluetooth Headset Universal Intercom: Allows allows pairing to another brands of Bluetooth headsets Multi-Pair Bluetooth intercom. Bluetooth stereo headset by A2DP Easy operation by versatile Jog Dial Advanced Noise Control: Improved wind and engine noise reduction Sidetone: Now you can hear yourself talk similar to a Goldwing or Harley Davidson intercom