<b>Product Description</b><br> <b>Product Name:</b>Smart City Commuter Bling Helmet<br> <b>Model:</b>SH50<br> <b>Helmet Materia</b>EPS+PC<br> <b>Weight:</b>360g(M)370g(L)<br> <b>Shell Size(cm):</b>54-58(M)57-61(L)<br> <b>Dimension(mm):</b>275(L)x214(W)x159(H)(M)<br> <b>LED Light Bead:</b>7<br> <b>Light Mode:</b>Quick Flashing Light, Tidal Light, Double Fast Flashing Light.<br> <b>Battery:</b>3.7V 455mAh<br> <b>Battery Endurance:</b>approx.36hrs for lighting<br> <b>Standby Endurance:</b>approx.180 days<br> <b>Charging Time:</b>approx.3hrs<br> <b>Lovely Design with Rich Connotation:</b><br> The SH50 smart helmet adopts a concise and fluent design with natural transition between brim <br>and body for a harmonious isual pleasure. <br>The helmet shape is specifically designed for Asians, <br>superior wearing comfort guaranteed.It looks really nice whether ridinga bike, E-bike.<br><br> <b>Young, is an attitude:</b><br> Those who work really hard and return home late are those whose safety require special attention Lifeis <br>all about strugging No matter howlate itneeds to be, we are there foryou. <br>This smart & safe city commuter blinghelmetequips automatic sensor lighting plus passive protection,<br> a driving force foryou to keep going.<br><br> All data are measured in a typical urban night environment by Smart4U lab. <br>There might be deviation in the course of practical use because of the change of objective environment.<br><br>