Detecting the Best and Optimal Time for Mating Bitches; Helps to Eliminate the Expense and Time of Repeat Mating of the bitch; Identification of so called Heat, Silent Heat and Ovarian Disorder. Elimination of problems with disorders during heat; Effective in Time Saving and Reduction of Costly Visits to the Vet; 1. clean the probe and probe use (must the cleanliness of the probe, do not use disinfectant, alcohol and other disinfection products) 2. Fix the dog and insert the probe into the position of the cervix (reference standard: small dog 3-4CM/medium dog 6-8cm/ dog 9-10cm) 3. After inserting, it will be rotated 480 degrees - 720 degrees, fixed position, do not move. Click on the switch, the display will show data, click the switch again, the data will be retrieved. The third click on the switch will in a third data.(When testing three sets of data, keep the instrument not moving, we recommend using the third data) Display screen:2.6 Inch LCD Detecting Speed:within 3s Detecting Range:10-1990 units Working Temperature:0-50 Celsius Max. Humidity:85% Power by:1 * 9V battery (not included) colour:black material:plastic Package Contents: 1 x Dog Ovulation Tester Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.