This Prove Multifunction 4-in-1 Infrared Thermometer drops from $34.99 to $17.99 at Amazon. This is the first time we've seen it under $22. It has four settings for measuring the temperature of a child's forehead, an adult forehead, an ear, or the room temperature. It also has internal memory that stores 40 readings. This is an Amazon exclusive brand that has good ratings. The thermometer has 4.4 out of 5 stars from over 10,700 reviewers. Prime members get free shipping. Non-members get free shipping over $25. Otherwise, it adds $5.99. Sales tax is charged in most states.