**Spanner Skull is upgrade version, fully automatic without any button.

Features?
Suitable for all welding Applications: ARC, MMA, MAG, TIG & Plasma Cutting
Fully Automatic Darkening Welding Helmet
Lightweight, durable, corrosion & flame retardant
Double arc sensors
Utilizes high performance solar cells w/ built-in 3V lithium batteries(CR2032) as power back up
Super Fast Darkening Speed: 1/25,000 Second
Fully automatic power On/Off
External variable shade control
Sensitivity control by variable dial (low-high)
UV/IR protection
Certified CE/EMC, GS & ANSI (Z87.1)
Complies standards & ANSI Z87, 1-2003 standards
Specifications?
Viewing Windows: 92.5 x 42.5mm     
Response Time: 0.0002MS    
Retention time: 0.4ms~0.8ms
UV/IR protection: DIN 15
Power Supply: Solar with Lithium Backup   
Operation temperature: -5 ~ 55C

Package includes?     
1 x Auto Darkening Solar Power Welding Helmet