Retra Booster 24574564 - High-Performance Car Engine Booster for Enhanced Fuel Efficiency & Power | Ideal for Daily Commute, Road Trips & Performance Tuning

The Booster is a singular piece that increases the performance of the 4th generation Retra Flash models (Pro Max. Prime +. Pure) by giving space for 8x rechargeable AA batteries.

The Booster doubles the battery life and reduces the recycle time by more than 50%. Once mounted it is very secure so you can hold on to it while adjusting the strobe underwater.