Effective dog training collar: four functions: warning signal, vibration, electric shock. Signal mode: vibration, beep and light. Choose the model that best more suitable and upgrade it according to your needs and your dog. 300 Meters Range & Lock Button: The dog training collar is designed with a long range of 300 meters, so you can easily train your dog in the yard or park. A secure lock button prevents misuse or manipulation of the remote. Waterproof receiver: works well even when submerged in water, allowing your dog to swim or bathe freely with the collar. Size: 145mm130mm43mm [Note] The package does not contain batteries Packing list: 1 * Pet Bark Plug We only sell Pet Bark Plug, not other items in the picture. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. Due to the manual measurement, please allow slight errors in size.