... all pumping ,2.More hand & wrist fatigue,3.Drip Nozzle design,4.Common work with all 38/400 enclosures & mjority ... chemical and formula. FeaturesBattery operated, No pumping,Stream or spray,Locking spray nozzle,Quiet operation,Multi-purpose Battery operated to support jet ... chemical and formula. FeaturesBattery operated, No pumping,Stream or spray,Locking spray nozzle,Quiet operation,Multi-purpose!