SportDOG Wall Adapter Accessory charges your trainer when not in use and works with many dog training collar receivers and handheld transmitters, This Sport Dog Wall Adapter is compatible with:, SD-425 SportDOG FieldTrainer 425, SD-4254S SportDOG FieldTrainer 425 for Stubborn Dogs, SD-425CAMO SportDOG WetlandHunter 425 in Realtree Camo, SD-825 SportDOG SportHunter 825, SD-BEEP SportDog UplandHunter Accessory Beeper, SKU: GRAIN153