LIVALL C21 Smart Bike Helmet with LED Lights & Removable Visor, NTA8776 E-Bike Certified, Bike Helmet with Fall Detection for Adults Men Women, Bicycle Helmet for Commuter E-Bike Scooter Skateboard

About this item

• Detachable Visor：Need a little extra UV protection? Use the visor to stay safe from the sun’s powerful rays. You can also quickly and easily detach it.
• Fits For Your Head: Medium from 21.26 to 22.83inches(54-58cm); Large from 22.44 to 24inches(57-61cm). To ensure a comfortable fit, please choose a size 2cm larger than your actual head circumference.
• Bright LED Lighting: Packed-full with smart lighting technology, it provides riders with a high level of security at all times and in all directions. Inductive LED lighting can be set to automatically turn on even in the darkest settings.
• Brake Warning Lights: Activated when the built-in-gravity acceleration sensor detects a significant deceleration, the front and rear lights are enhanced for 3 seconds to draw attention from surrounding traffic.
• Auto-Off Function: It ensures maximum battery longevity by automatically powering off when it is disconnected from a phone and has been motionless for 15 minutes.