Cardo Scala Rider Q3 Multiset Features Bike-to-Bike Intercom between four bikers (toggling) within a range of up to 1,100 yards in Full Duplex Rider-to-Passenger intercom in Full Duplex Music Sharing Rider passenger can enjoy listening to the same stereo music (via A2DP) Detachable Speakers Users can plug in their own speakers (3.5mm jack) Large, intuitive control buttons Click-to-Link spontaneous intercom with no need for pairing Interchangeable boom and corded microphones included to fit virtually all helmets Unique online platform allows you to customize settings and receive software updates via your computer Hot-Dial number can be programmed for use in any country or region AGC technology Self-adjusting speaker volume according to speed and ambient noise VOX activation Make and answer phone and intercom calls without taking your hands off the handlebars Built-in FM radio with RDS, 6 programmable station presets and smart auto scan Spoken Status Announcements so you always know to which devices your scala rider is connected Up to 8 hours talk-time / 1 week standby (recharging from wall outlet or USB connection) Noise cancelling microphone Certified Waterproof and Dustproof (IP67 standard) Multiple Connectivity options Dual HS profile for connection to two Bluetooth-enabled mobile phones simultaneously Stereo Bluetooth (A2DP) enabled MP3 player / iPod or smartphone to stream wireless music Non-Bluetooth audio player (via MP3 cord) Bluetooth-enabled GPS unit for in-helmet navigation instructions (GPS must support HS profile) Other scala rider models for intercom conversation