Marco Polo
Eureka Technology MARCOPOLO Advanced Pet Monitoring, Tracking and Locating System (for Dogs and Cats 5 lb and Larger)
CAT TAILER
Cat Tailer Cat Tracker - Small and Lightweight Waterproof Bluetooth Pet Collar Attachment, 328 foot Range, Replaceable 6 Month Battery Life, Android/Apple iOS Compatible
FitBark
FitBark 2 Dog Activity Monitor | Health & Fitness Tracker for Dogs | Waterproof, Small & Leightweight (10 g) | Not a GPS Tracker
Altranet
Loc8tor Pet Tracker | Tracking Cat Collar | Pet Tracking System | RF Tracking & Activity Monitor | No Monthly Fees | Cat & Dog Pet Finder | Includes 2 Transmitter Tags