The never pump Insta-Spray? sprayer has a thumb-operated 3-position switch with on, off and reverse (reverse position draws residual liquid out of wand and hose back into tank). Uses 4 standard ?D? batteries (not included); rechargeable batteries are approved for use with this product. Batteries last 10 gallons, all season. Double telescoping wand extends from 16 in to 35 in with no bending. Sprayer has handy on-board wand storage with a 1.3 gallon translucent tank.