Cardo scala rider Q1 TeamSet Bluetooth Motorcycle Headset and Rider-to-Passenger Communication System, Dual Pack (Discontinued by Manufacturer) Rider-to-Passenger intercom in full duplex Interchangeable microphone options included. Can be used with your choice of speakers (standard 3.5mm) Self-adjusting speaker volume according to speed and ambient noise (customizable) Up to 10 hours talk-time between charging (charge via included wall adapter or USB connection) Waterproof and Dustproof