Sena Technologies's Momentum Evo puts their top of the line and proven Mesh technology inside a sleek and safe composite fiberglass shell. Pair up to 16 riders and chat for up to 17hrs with open Mesh intercom. Sena Technologies' advanced sound processing filters out road and wind noise around you making it easier to hear the other riders you are connected to. Listen to music through your phone or through the built in FM radio, making multitasking and hearing turn-by-turn GPS directions a breeze.; ; ; Bluetooth: 17hr talk time 2.5hr charge time Mesh Intercom allows pairing up to 16 riders Bluetooth 4.1 1.2 Miles/2 Kilometer range Audio multitasking Advanced noise control Voice commands FM radio Remote control compatible; ; Helmet specs: Composite fiberglass shell Round oval head shape Scratch resistant shield UV resistant Pinlock included Removable/washable liner Breathable Moisture wicking D-ring closure Meets or exceeds D.O.T. standards