The Ag-Medix AG-102 Animal Rectal Veterinary Thermometer with Easy-Read Arm Holster records rectal temperature of cattle, horses, swine, sheep, and other large and medium-sized animals in as fast as 7 seconds! Perfect for dairy feedlot.  This state-of-the-art animal thermometer is smartphone-sized, fast, lightweight, water-resistant, and reliable in harsh environments. Unique armband lets you mount the thermometer on your forearm, freeing up a hand.