Antra AH7-X90 Series welding helmet is featured with the digital controlled 4 sensor auto darkening lens with TOP Optical Class 1/1/1/1(The less # the better), which is extremely fast responsive to electric arc from TIG, MIG, MMA or Plasma applications. LCD Shade display eliminate guess work, the lens stays on the shade you see! This light weight welding helmet is so versatile that it can be used on grinding, cutting and welding applications. It is a perfect upgrade for goggles and fixed shade glass welding helmet, or regular control auto helmets at a fraction of cost. *Features: – Manual power ON, Auto OFF. – Digital controlled sensitivity and delay setting with LCD display – UV/IR Protection: Permanent Shade DIN13 – Hard hat adapter (Sold separately)- Power off delay 30 minutes, the filter keeps alive for 30 minutes in dark environment before it goes to sleep. *Specifications: – Viewing Area: 98mm x 82mm/3.86″ x 3.23″- Cartridge Size: 133mm x 114mm x 9mm/5.24″ x 4.5″ x 0.35″- Optical Class: 1/1/1/1 – Reaction Time: 0.00004(1/25,000) Seconds – Dark to Light: 0.1-0.9 Seconds- Light State: Shade DIN 4- Dark State: Shade DIN 5-9/9-13- DC TIG Amperage Rating: >2 Amps- Battery Type: Solar Cell + 2X CR2032 (Replaceable) – Helmet Material: High Impact Polyamide Nylon- Operating Temperature: -10°C- 55°C (14°F-131°F)- Storage Temperature: -10°C- 55°C (14°F-131°F)- Meet Standards: ANSI Z87.1 / EN379 CE / CSA Z94.3- Weight: 525g/18.5oz *Spare parts: – Exterior lens covers:ASIN# B00CILLEV8- Inner lens covers: ASIN# B01MY066N0- Head Gear: ASIN# B01M365MTP (New Version) ASIN# B00IAGN35K (Old version) – Hard hat adaptor: ASIN# Coming soon – Cheater Lens: ASIN# B017IDJKMK (Diopter various) *Note: Head gear may require simple assembly.