PREMIUM SOUND QUALITY: Experience high-definition audio with deep bass while skiing or snowboarding; Alta ski helmet headphones feature 40mm drivers and Bluetooth 5.0 technology; Enjoy balanced dynamic sound at any volume on the slopes HANDS-FREE COMMUNICATION: Make calls without removing gloves or helmet; Double-press to activate Siri or Google Voice; Built-in microphone enables clear conversations; Perfect ski communication device for staying connected on mountain adventures UNIVERSAL HELMET COMPATIBILITY: Fits most audio-ready ski and snowboard helmets including Wildhorn, Smith, POC, K2, Giro, Bolle, Anon, and Burton; Compact 2.2 x 1.8 x 0.5 inch design drops easily into helmet ear pads for comfortable wear GLOVE-FRIENDLY CONTROL: Designed in Utah by winter sports enthusiasts; Three oversized buttons allow easy operation without removing gloves; Control volume, change tracks, activate voice assistants, make calls and pause music while keeping hands warm ALL-DAY PERFORMAN