Ansu is a brand of Asa Pharmaceutical, Japan's No. 1 pesticide manufacturer, with a market share of more than 50% in Japan. In 1990, Japan Ace Pharmaceutical opened a production base in Tianjin and established an Asian sales network. Compared with Golden Bird, Ansu has a more complete product line in the Chinese market, which is more convenient to buy.
 
The active ingredient of Ansu Electric Mosquito Coils is promethrin, and the product formula is slightly backward compared with radar and golden bird, and its effect is not as good as tetrafluoromemethrin. Promethrin belongs to the second generation of pyrethroid products, and its efficacy is 2~6 times that of the earliest popular allymethrin in the Chinese market, although the efficacy is not as good as the latest products, but it still reaches the due level of electric mosquito coils.
 
In addition to the PTC heating element that stabilizes the heat generation, the core rod of the electric mosquito coil is also an important part of the technical core. The function of the mandrel is to adsorb the liquid medicine and transmit it to the heating device through capillary action, so that the liquid medicine volatilizes into the air in a gaseous state. Due to the adsorption effect of the traditional wood powder mandrel, the active ingredients of the liquid medicine cannot be completely volatilized synchronously in the initial 0~8 hours of use, but accumulate more in the mandrel rod. Ansu uses a more unique graphite mandrel to make the drug volatilization more balanced, and the initial effect is basically the same as that in the later stage.
 
Compared with the Golden Bird, the price of Ansu electric mosquito repellent is more affordable, and the price of 720 hours of 1.5% odorless electric mosquito repellent is 20.8 yuan, but its actual use time is shorter than the manufacturer's claim.