This is a device for fighting varroatosis during pre-winter time using oxalic acid. Treatments should be carried out at 2-10 degree Celcius. The procedure should be performed once, preferably in November - December. Pour 1g-2g of oxalic acid crystals into the reservoir at the end of the device; then insert the device through the inlet to the hive.
Connect the 12 V power supply to the device for the period of 2.5 minutes. Then disconnect the power and wait for about one minute. Then move on to the next hive and repeat the procedure.