The Bonica flash diffuser/deflector snaps onto the rim of the lens port of the Bonica Snapper-XP housing. It can be rotated into one of three positions:
1. Diffuser - This is used to soften the built-in flash, use for close-up or macro photos
2. Deflector - Is used to block the built-in flash and deflect the light upwards to trigger the slave strobe
3. Off - Rotate the piece away to use the built-in flash without diffusion