PetSafe receiver collars stay & play for PIF-300-21 This additional receiver collar can be used for an another dog to the stay + wireless fence™ or wireless pet containment system to add. Or as a replacement collar for this wireless pet restraint system. Properties * suitable for dogs from 2.3 kg and heavier * Fits neck sizes from 15 to 58 cm * Your pet with a beep alert tone-only mode * 5 adjustable levels of static excitation * Edginess protection: Stimulation stops after 15 seconds * Waterproof * Works with a rechargeable battery * Each load is usually 3 weeks * Battery charges in 2-3 hours * Low battery indicator Compatible with the stay + play wireless fence™ or wireless pet containment™ system (PIF-300-21)