The Garmin Barklimiter 2 is a very small and lightweight collar suits dogs from 4.5kg in weight. It has exchangeable plastic contact probes which is more comfortable to sit on dog's neck than traditional metal probes. Package comes with a pair of long and short contact probes to fit long and short hair dogs. The Barklimiter 2 collar is fully waterproof and rechargeable with fast charge lithium battery. It could last up to 30 days per full charge (collar turns off when not in use and max 8 hours standby time per day).