Neptune 2-in-1 Knapsack Power Duster Sprayer, engineered to meet the demanding needs of modern agriculture. Featuring a robust 31 cc 4-stroke petrol engine, this advanced sprayer combines the functions of a cold fogger mist blower and a duster, offering efficient solutions for pesticide application and other agricultural treatments. With its 20-liter ...backpack tank and ergonomic design, this sprayer ensures extensive coverage and ease of use across large areas. 2 stroke & 4 stroke Feature 2-Stroke Power Sprayer 4-Stroke Power Sprayer Fuel Used Petrol mixed with 2T oil Only petrol (20W-40 oil separate add) Maintenance Higher maintenance required Low maintenance Fuel Efficiency Less fuel efficient More fuel efficient Noise Level More noise Less noise, smoother running Starting Easy and quick start Smooth and stable start Weight Lighter in weight Slightly heavier Power Output High power for short duration work Consistent power for long duration work Operating Cost Higher running cost Lower running cost Best Usage Small farms, occasional use Large farms, regular & professional use