Dogtra 610C Training CollarThe 610C is a no nonsense trainer with intuitive one handed controls and an ultra compact receiver collar designed for small to medium sized dogs. Activity: Obedience Power: Low to medium power stimulation Range: Up to 600 metres Weight: For dogs as small as 10lbs 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