A dispenser device comprising a pistol housing, a needle direction control mechanism, a boost mechanism, a quantification control mechanism, and a combination of a housing, a needle direction control mechanism, a boost mechanism, and a syringe positioning mechanism or a holding ring embodies the present invention with features and advantages shown as follows, (1) Uniform injection of agents synchronously mixed by not less than two contents (2) Mixed agents not exposed in air (3) Uniform injection, high air tightness, injection direction controlled by easy turning, smooth and convenient operation, high powerful operation via shifts of a push rod driven by a pressed trigger, promoted yield rate, assembly easily constructed, reduced manufacture cost, and convenient maintenance.
