For dogs 3.6 kg and up Fits neck sizes 15 - 71 cm 5 adjustable levels of static stimulation Tone-only mode alerts your pet with a beep Over Stimulation Protection: Stimulation stops after 30 seconds Run Through Prevention- Static Stimulation increases if your dog tries to run through the boundary zone Waterproof Collar uses 1 x 6 Volt battery (included) Battery usually lasts 1-3 months Low battery indicator Compatible with the Stay + Play Wireless Fence™ or Wireless Pet Containment System