The compact FieldTrainer 400 is ideal for training in the yard, field, or for hunting with dogs that hunt close. Both the Transmitter and Receiver are waterproof and submersible. It comes as a 1-dog system, but can be expanded to control up to 3 dogs by adding SportDOG Brand Add-A-Dog™ collars. The comfortable "soft coat" Transmitter finish makes this unit a pleasure to handle. Dog Training Gear the way you'd design it.

The SD-400S offers all the features of the SD-400, but is specially designed for tougher, more stubborn dogs.

• 400 yards range 
  
• Expands to 2 or 3 dogs 
  
• Waterproof transmitter 
  
• Waterproof receiver 
  
• Up to 16 levels of continuous and 8 levels of momentary stimulation 
  
• Tone only button 
  
• Low battery detect feature in both transmitter and receiver 
  
• Replaceable, rechargeable NiMH batteries 
  
• Very small transmitter (3.2 oz.) 
  
• Very small receiver (2.8 oz.) 
  
• Lanyard 
  
• Lifetime Limited warranty