Viekoo via Amazon offers the Prooral Clinical Professional Digital Thermometer for $12.99. Coupon code "OLS842PU" drops the price to $4.99. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.03.) It features an LCD display and is calibrated to be accurate to 0.2° F. Deal ends March 29.