Tetra Whisper Internal Power Filter water proof remote trainer Package Includes: 1 x Transmitter Package Includes: 1 x Transmitter 1 x Receiver collar 1 x Nylon Belt 1 x Splitter Cable 1 x Charger 1 x Test Light 1 x wrist Strap 4 x Contact Points 4 x Conductive Silicone 1x Manual WARNING： Training collars are used to train dogs If a rash or sore is found and the condition persists beyond 48 hours All Whisper® power filters use easy to change Bio Bag® filter cartridges which remove particles floating in your aquarium while also removing discoloration and odors with its activated carbon Three filters in one for cleaner water and healthier fish