Review on Smart4u SH20 Smart Bike Helmet: Bluetooth Music & One-Touch Calls, Certified for Safety - Ideal for Men & Women in Road Cycling by Jairo Cunha

works as expected. Approximately 7 hours of use before deciding to charge a second time (not sure how much charge is left but I'm guessing between 25% and 40%. Stays connected while streaming and can listen to music well anytime still hear app notifications about traffic and cycling There was a brief call - but not really enough to check the mic (the person heard me but wouldn't speak while I huffed and puffed).