Features： 1、With USB Rechargeable Rear Light: Rear brain tail light for night riding are more reassuring. Embedded warning tail light at the rear, high brightness, capable of charging with USB, with 9 LED light modes. 2、Magnetic Goggles: Magnetic suction goggles filter strong light. Bike helmet for adults uses high definition PC goggles, the front view looks softer through the lens. 3、Integrated Molding: The bike helmet adopts an integrated molding process, which is more effective in dispersing impact compared to traditional bonding structures. 4、18 Air Ducts Design: Adult bicycle helmet has18 air ducts, providing long lasting freshness, breathability, and reduce stuffiness. 5、 Material: The adult bicycle helmet is made of PC and EPS material, which is sturdy and durable, exquisite and beautiful. Specification： Item Type: Bike Helmet Material: PC, EPS Weight: Approx. 506g / 17.8oz Head Circumference: Approx. 61-65cm / 24.0-25.6in Battery: Built In Lithium Battery x 1 Capacity 220mAh Package List： 1 x Helmet 1 x Goggles 1 x Accessory 1 x USB Cable  1 x Manual