-30% Polyester 70% Acrylic
Built-in 250mAh battery with extended battery life - up to 16-20 hours continuous music play when fully charged, The longest working time in market.
This hat has an upgraded bluetooth chip with bluetooth 5.2, which offers the stablest and strongest connection. Fast and Easy to sync. Much better connection than Bluetooth 5.0.
Upgraded HD speakers offer sound output up to 110db
Combined double knitting, much thicker but still soft to keep your head warm & comfortable in winter while enjoying music play and phone calls.