1. Simple and portable structure, very safe, comfortable to wear. automatic dimming lens automatically dimming, this is a choice when light from the number of welding inspection. 2. Auto-Darkening eyes mask are designed to protect the eyes from spark, spatter,effectively block the ultraviolet, infrared, visible light is more easy to pass,reduce the harmful radiation under normal welding conditions 3. Outside the curtain quantity and sensitivity adjustable can make the operator operation more convenient, with manual level setting function automatically change light welding goggles. 4. Suitable for electric welding protection, anti-glare, face protection, grinding operations, etc. Shade control:Light states:DIN3 Dark states:DIN11 Dark state Shade No: DIN9-DIN13 stepless adjustment Switching time:Light to Dark:1/25000s(working at room temperature) Delay time:Dark to Light:0.20-0.35s Power supply:Solar cells,no battery change required Power ON/OFF: Fully automatic Operating temperature: -10 to +55 size:140 x 95 x 62mm Material:plastic colour:Dark green Package Contents: 1 x paper box 1 x welding eye mask Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.