Professional SAE Measuring Wheel, 12 in Wheel, Feet;Inches no checkout for less irritable daily use Delivers for less irritable daily use Delivers better grip in both dry and slightly oily conditions ZONZ™ Comfort Fit Technology optimized lining relieves tension Dermatest® certified for skin friendliness Latex and silicone free horn and battery function Low battery indicator—Smoke alarm will chirp in the event of a low battery Red LED—Flashes every 30 40 seconds to indicate that the smoke alarm is receiving power Dust cover Battery operated—Easy installation and continuous protection even during power outages Bolstered folding joint allows for compact storage and longer product life Designed to open under direct stress instead of breaking Over mold pistol grip handle for increased user comfort Heavy duty counter reset