ehelmet5 is an iterative product that not only retains the key features of the previous generation – turning signals, automatic light perception, SOS emergency lighting, Bluetooth speaker, hands-free phone answering, and real-time voice navigation based on mobile networks – but also adds several new ones, including a front warning light, a brake warning light, two-way anti-loss protection, and automatic shutdown. One might think that so many functions make heavy demands of the user, but this smart helmet does all the work. For example, when the built-in gravity acceleration sensor detects significant deceleration, the front and tail LED lights illuminate for eight seconds to draw the attention of nearby drivers and pedestrians.