Knapsack sprayer OPP-1A /ERA/ is designed for chemical protection of vineyards, berry-fields, young gardens, vegetables and other crops, that grow on small areas difficult of access for the use of highly productive sprayers, against pests and diseases by spraying the plants with emulsions, suspensions and chemical pesticide solutions. The price is competitive comparing to European analogues – 22.50 USD/per unit (DAF – Ukrainian border–Chop).