1, Detecting the Best and Optimal Time for Mating Bitches;2, Helps to the Expense and Time of Repeat Mating of the bitch;3, Identification of so called False Heat, Silent Heat and Ovarian Cycle Disorder. 4, Elimination of problems associated with disorders during heat;5, Effective in Time Saving and Reduction of Costly Visits to the Vet;6, Reduce Financial Costs and Expenses Associated with Multiple Mating. Instructions:1. Please clean the probe and probe before 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/large 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 result in a third set of data.(When testing three sets of data, keep the instrument not moving, we recommend using the third set of data) Specifications: Testing Method:2.6inch LCD Screen Display Screen:2.6 Inch LCD Screen 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: ABS size: 32 * 10cm Package Contents: 1 X Dog Ovulation Detector (battery not included) Only the above package content, other products are not included. Note: Light reflection 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.