1.Structure. The sprayer consist of barel, a base, a battery, a mini pump, a charger, a spraying system (rubber tubes, switch, spray rod nozzle) & Belt 2. Features, 1. the barrel back is designed according to the principle of ergonomics, easy to backpack 2. using a mini diaphragm pump which is small size, light weight, high preasure, durable and featuring a preasure protection switch to allow automatic preasure-limit protection. 3. with filter protection to prevent foreign matters or particles from blocking the nozzle. 4. with a speial charger, the indicator lamp of charger : red-charging; Green-Charged/ Stand-by