Perfect tactical full helmet, welcome to buy Features: *ABS material, weight 1.8kg *Size: 31 * 23 * 25cm/12 * 9.0 * 9.8 inches, two sizes, *Applicable to head circumference 52-62cm/20.4 "- 24.4" "(adjustable) Built in communication headset, which needs to be used together with PPT and walkie talkie Built in fan: Built in demisting fan. Three stage regulation: weak wind strong wind closed. The battery box is hidden on the back of the helmet, and AA battery * 3 needs to be installed Super perfect full helmet: Use this highly protective and breathable tactical full helmet to enter the battlefield without worrying about the damage of BB fire! Meet your needs for the perfect airsoft game 100% Customer Satisfaction Guarantee: If you have any questions, please feel free to contact us, and we will immediately correct the situation or provide a refund/exchange