The SportDOG Brand SportTrainer 1825X boasts a 1600 metre range - one of the furthest in the SportTrainer family. The 1825X model also supports the highest number of dogs - up to 6, with purchase of Add-A-Dog collars. The SD-1825X allows you to communicate with your dog using tone, vibration or one of the 21 levels of static stimulation. Waterproof and submersible to 7.6m. Rechargeable, charge in 2 hours...