Sena SRL3 Headset - being a Mesh communication system specifically made for Shoei Helmets with SOUND speakers by Harman Kardon. The SRL3 is designed specifically for three of SHOEI's most popular helmets, the GT-Air 3, Neotec 3 and J-Cruise 3. Once installed, the compact SRL3 unit is virtually undetectable from the helmet's exterior. The left side of the SRL3 features a 3-button control, while the right side houses the simple one-click-to-connect Mesh Intercom button. Hands free control with voice commands: Answer the phone or starting up a Group Mesh session Supports voice commands in 8 languages: English, French, German, Spanish, Italian, Chinese, Japanese, and Russian "Hey Google" and Siri with just a simple voice command allowing you to tap into the power of your smartphone's features (GPS, music, voice dialing...) Mesh & Bluetooth: Mesh Intercom with 2 modes - Multi-Channel Open Mesh Intercom (Open Mesh) and Group Mesh Intercom Open Mesh, like the standard handheld or CB radios, lets users switch between 9 channels Single push of a button to click-to-connect to the Mesh Intercom Supports a near-limitless number of users within a range of up to 8 km (min. 6 riders @ 1.6 km intervals) Group Mesh supports a single, private group for up to 24 participants and the same range as Open Mesh for a more intimate group conversation SOUND by Harman Kardon: Speakers and microphone were created with the audio experts at Harman Kardon to provide world-class sound inside your SHOEI helmet Microphone with a redesigned sensor provides robust performance for voice communication Users can switch between the wired boom microphone and the wired microphone Compatibility: Shoei GT-Air 3 Shoei Neotec 3 Shoei J-Cruise 3 Specifications: Dimensions: 82 x 39 x 33 mm Speaker: 40 x 7.3 mm Boom Mic Length: 55 mm Wire between Speakers Length: 85 mm Weight: 100 g Bluetooth 5.0: Headset Profile (HSP) Hands-Free Profile (HFP) Advanced Audio Distribution Profile (A2DP) Audio Video Remote Control Profile (AVRCP) Intercom: Working Distance: Up to 2 km in open terrain (Can extend up to 8 km between a minimum of 6 riders on Mesh) Support: Up to 4 riders (Bluetooth), 24 riders (Group Mesh), or virtually limitless (Open Mesh) Support Channels: Up to 9 channels on Open Mesh Audio: Noise Cancellation: Advanced Noise Control Codec: Built-in SBC Codec Battery: Talk Time: Up to 12 h (Bluetooth) or 10 h (Mesh) Charging Time: 2.5 h Notes: Please check the User Guide (1.20 MB) for additional information. For a headset that fits the GT-Air 2, Notec 2 or J-Cruise 2, please check the Sena "SRL-Mesh" Headset. For a headset that fits the RF-1400, please check the Sena "SRL-EXT" Headset.