Water Tech 31000KL Pool Blaster® Max Li CG Commercial Grade Cordless Pool & Spa Vacuum. Commercial Grade Cleaning. Increased coverage and capacity over the original Pool Blaster® Max Features the same high flow pump as the original Max® for extra power for deep cleaning PLUS a 13” Scrub Brush Head, and increased debris capacity to tackle any size pool in minutes. Ideal for In-Ground Pool and Above Ground Pools.