40mm SPEAKER DRIVERS - With 40mm speaker drivers, the Pucks 2 pump out clear sound with an enhanced bass response and audio performance QUICK CHARGE Port - Charge your Pucks 2 while they stay in your helmet with the USB-C port; You can also use the included USB-C to headphone jack cable for wired use; Charge port is fully waterproof, so no need to worry about it getting wet from snow or rain. Just ensure the charge port is dry prior to charging ZELLO APP - After playing some of your favorite tunes, use the Zello walkie-talkie app to talk with your friends, without ever taking your phone out of your pocket; Push-to-talk one-on-one or create a group; Even share your GPS coordinates; Requires cellphone or wi-fi coverage HELMET AUDIO – Optimized for helmet audio liners; Large button on each earpiece allows for easy control, even with gloves on; AUDIO SHARE – pair your Pucks 2 to one other Pucks 2 and share your music with a friend; Audio share range is 20 feet and transmits Bluetooth audio only; it does not transmit aux-in audio ECOTALK- simply press both multi-function buttons at the same time to enable your voice assistant and operate your smartphone while it remains safely in your pocket The Bluetooth Pucks 2 helmet audio solution allows you to listen to music from your phone or use the Zello walkie-talkie app to talk with your friends, without ever taking your phone out of your pocket! Bluetooth 5.0 - streams your music from your phone to the Pucks 2, or connect using the USB-C to headphone jack cable for optional wired use100% Waterproof (IP67) - IP67 tested to be 100% Waterproof, Rugged and Snow Proof, tested to work in temperatures as low as -4 degrees Fahrenheit - Pure HD Sound - 40mm Drivers for clear sound with enhanced bass response and audio performance - Helmet Audio - large buttons make it easy to adjust volume, change tracks, play, pause or take calls while wearing gloves. Compatible with helmet liners that support audio drop-ins300m - Ah Lithium Battery - for up to 15 hours of playtime and quick 1.5-hour recharge time - Zello Walkie-Talkie App - Push-to-talk one-on-one or create a group. Even share your GPS coordinates (requires cellphone or wi-fi service)ECOTALK - direct connect to Siri or OK Google, compatible with hands-free built-in mic - Audio Share - pair your Pucks 2 to one other Pucks 2 and share your music with a friend up to 20 feet away