Livall EVO21 Smart Cycling Helmet Bluetooth Helmet with Auto Sensor Lighting Offer 360°Warning Light Brake Warning Light and Turn Signals for

It offers true 360°coverage, with a brake warning light and turn signals for visibility from all directions, controlled by the handlebar-mounted wireless remote. Lighter And More Comfortable: With 30% more ventilation and 350g lightweight design, you’ll stay ahead of the pack while cutting down on sweat. Auto-Standby and Auto-Wakeup Mode: After the helmet powers on and stays stationary for a while, it will automatically begin saving power by going into sleep mode. When the tail light is off, without user interaction, the helmet is in sleep mode; To wake up the helmet, shake it several times until the tail lights illuminate. Fits For Your Head: Medium from 54cm to 58cm; Large from 57cm to 61cm A