![Amazon.com : Dogtra 1902S HANDSFREE Plus Boost and Lock, Remote Dog Training E-Collar, HANDSFREE Square, 3/4-Mile Range, Rechargeable, Waterproof, High-Output, 2 Dog System, eCollar for Medium, Large Dogs : Pet Supplies Amazon.com : Dogtra 1902S HANDSFREE Plus Boost and Lock, Remote Dog Training E-Collar, HANDSFREE Square, 3/4-Mile Range, Rechargeable, Waterproof, High-Output, 2 Dog System, eCollar for Medium, Large Dogs : Pet Supplies](https://m.media-amazon.com/images/I/813eg-FkT3L._AC_UF350,350_QL80_.jpg)
Amazon.com : Dogtra 1902S HANDSFREE Plus Boost and Lock, Remote Dog Training E-Collar, HANDSFREE Square, 3/4-Mile Range, Rechargeable, Waterproof, High-Output, 2 Dog System, eCollar for Medium, Large Dogs : Pet Supplies
![Amazon.com: Dogtra Edge RT Long Range High-Output 1-Mile Waterproof 3-Dog Expandable Remote Dog Training E-Collar with Combination Boost Control for Professionals : Pet Supplies Amazon.com: Dogtra Edge RT Long Range High-Output 1-Mile Waterproof 3-Dog Expandable Remote Dog Training E-Collar with Combination Boost Control for Professionals : Pet Supplies](https://m.media-amazon.com/images/I/61qCVUcK98L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Dogtra Edge RT Long Range High-Output 1-Mile Waterproof 3-Dog Expandable Remote Dog Training E-Collar with Combination Boost Control for Professionals : Pet Supplies
![Amazon.com: Dogtra 202C Waterproof ½-Mile One-Handed Operation 2-Dog Remote Training Dog E-Collar : Pet Supplies Amazon.com: Dogtra 202C Waterproof ½-Mile One-Handed Operation 2-Dog Remote Training Dog E-Collar : Pet Supplies](https://m.media-amazon.com/images/I/51JYe1PWXrL._AC_.jpg)