My helmet is from Harbor Freight item number 61611. It's got the one in 20000 seconds switching speed, auto darkening lens, solar power with battery assist, automatic power on and off with adjustable delay time, it's got a variable shade control and adjust from number 9 and number 13, with the resting shade of 4, uv/ir protection. anyway use 20 % coupon if you buy it I bought mine on sale.
