This 2 AAA penlight is cULus - 913 listed Intrinsically safe. It is ultra-compact and super slim with a powerful light output designed to illuminate very tight spaces. The tail-cap switch provides momentary or constant-on functionality. Includes the NS-HMC12 mounting clip. The clip can be attached to virtually any hard hat or helmet using a very powerful self-stick PSA adhesive with alcohol cleaning pad. Power comes from 2 AAA batteries (included). Nightstick Intrinsically Safe [Zone 0/20] INTRANT DUO IS Dual-Light Angle Light - 320 Lumens (4 AA's) XPP-5564GXA