Dogtra 612C Training CollarThe 612C is a training collar whose transmitter can be easily used with one hand. The very compact receiver is suitable for small to medium size dogs. The 612C can be used for two dogs. Power: Low to medium power stimulation Range: Up to 600 metres Features Ultra compact receiver collar designed for smaller dogs Checkered grips on the handheld transmitter Nick and Constant stimulation along with the High Performance Pager Enhanced contact points