Use oxalic acid to treat bees and control Varroa mites. Insert it into the tank of the evaporator and place it under the bee grapes through the air holes. Powered by a 12V car battery, the oxalic acid evaporates. Suitable for use with oxalic acid tablets or oxalic acid compatible powder. Ideal for mite control in gardens, backyards, patios and agriculture. Voltage: 12V Power: 150W Color: Black, Silver Material: Plastic, Metal Packaging Contents: 1 * Bee evaporator only contains the above packaging content, other products are not included. Note: Lighting shooting and different monitors may cause the color of the items in the pictures to be slightly different from the actual item. The measurement allowance is +/-1-3cm.