Sena SRL-EXT Bluetooth Headset for Shoei RF-1400

Features: Premium speakers & Microphone by Harman Kardon Mesh Intercom™ Technology 4-way Bluetooth 5 intercom Smart intercom pairing Audio multitasking Noise Cancellation: Advanced Noise Control Intercom: Working Distance: Bluetooth Intercom: up to 2 km (1.2 miles) in open terrain Mesh Intercom: up to 2 km (1.2 miles)* in open terrain *Can extend up to 8.0 km (5.0 miles) between a minimum of 6 riders Supports up to: Bluetooth Intercom: 4 riders Open Mesh Intercom: virtually limitless Group Mesh Intercom: 24 riders Supports Channels: Open Mesh Intercom: 9 channels Mesh Network: Mesh Intercom Technology Bluetooth: Bluetooth 5 Headset Profile (HSP) Hands-Free Profile (HFP) Advanced Audio Distribution Profile (A2DP) Audio Video Remote Control Profile (AVRCP) Audio: Noise Cancellation: Advanced Noise Control™ Codec: Built-in SBC Codec FM Radio: Radio frequency specifications: 76 ~ 108MHz 10 preset station memory Premium Speakers & Microphone by Harman Kardon