Very easy to use, this electronic detector let you know when the animal is in heat, even if it is silent and invisible. Insert the probe in the vagina twice a day during ovulation. Can also be used to confirm a gestation between the 19th and the 23th day after insemination. One year warranty. Description: 1- Hermetic case, making the device usable even with bad weather conditions ; 2- Portable machine for a use in total freedom ; 3- 9 volts battery and LCS display. Very resistant product sold in the whole world.