With the Aetertek AT-919C Dog Training System, you can train your dog via auto bark or remote control. The AT-919C has additional features over the 919C including a longer range (1000m). It features multi-functional modes - a warning beep tone, vibration mode & 9 levels of static shock. You can train 1 or 2 dogs via the same handset (see buying options below). Like all Aetertek products the design of the AT-919C is durable and user friendly.