Many people avoid using a camera flash because it washes people out, creates harsh shadows, and usually overpowers the background of the photo. You want to take better pictures underwater so you need a Diffuser for your Camera Strobe. The Sea & Sea Diffuser for YS-01and YS-02 Strobes will give you better contrast and richer colors when taking pictures. The diffuser attaches easily to the Strobe. So take better pictures with a diffuser on you strobe. Use of the Accessory Diffuser Drops the Light Level; the Beam Angle of 100° Degrees in increased to 110° Degree Beam Angle (with diffuser) changes the Color Temperature of 5,600K to a Color Temperature w/diffuser of 5,250K. The Diffuser fits on the front of the YS-01and YS-02 has a Fiber Optic Cable Port that lines up with the Strobe's Slave Trigger. Diffuser is made from Non-Corrosive Plastic and is covered by a 12 month limited warranty.