The SL3eLED waterproof light features high intensityillumination and extensive burn time in a compact design. Choose the SL3 as your secondary light and save the rest for your next adventure. Reliable waterproof seal requires 3 turns to first o-ring release (5 turns for second) Beam produces almost no peripheral light, reducing backskatter. Stainless steel valve releases excess pressure due to battery malfunctioning or flooding. Stainless steel loop clips to BC accessory snap clips.