PetSafe Deluxe Ultralight Add-A-Dog® Extra Receiver Collar. Progressive correction and anti-linger programming. For dogs 3.6 kg and up. Fits neck sizes 15 - 71 cm. 4 adjustable levels of static stimulation. Tone with vibration 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. Collar uses 1 x 6 Volt battery (included). Battery usually lasts 1-3 months. Compatible with PetSafe® In-Ground Fence systems. This Receiver Collar has...