This is normal for this design

If you'd like the collar to pick up on lower sounds or barks- increase the the sensitivity with the '+' node

FISHER & PAYKEL 836848

Cartridge hanger is not included or required for the 14 L model

Orku 2Kg Activated Carbon Powder Coconut Charcoal - Water Filtration YardPestControl This is normal for thisOrku Powdered Activated Carbon is a fine grade, steam activated charcoal powder manufactured for industrial and commercial adsorption applications. Produced under controlled quality standards, this micronised carbon offers consistent physical properties suitable for use in filtration, processing and purification systems. Features: Steam Activated Carbon: High temperature activation process creates a porous structure suitable for adsorption based