A multi-point buckle has a buckle, at least two latches and a plurality of dust jackets. The dust jacket is employed between the latch and the tongue slot of the buckle to achieve a close fit and seal effects, which not only increases the structural engagement stability between the tongue slot and the tongue but also prevent sand, dust and dirt from falling into the tongue slot not causing the latch from shaking loose and the friction and interference of foreign objects in the buckle.

A multi-point buckle has a buckle, at least two latches and a plurality of dust jackets. The dust jacket is employed between the latch and the tongue slot of the buckle to achieve a close fit and seal effects, which not only increases the structural engagement stability between the tongue slot and the tongue but also prevent sand, dust and dirt from falling into the tongue slot not causing the latch from shaking loose and the friction and interference of foreign objects in the buckle.

A linking device that can be added between the existing buckles of an external harnesssuch as a strap or collar. The linking device includes a GPS receiver and a radio frequency transmitter. The GPS receiver determines the present location of the linking device and the transmitter transmits the location information to a remote device such as a smartphone, tablet, laptop, or dedicated base station. The present location of the linking device can be determined and displayed on the remote device. The linking device also monitors the state of its connections to the external harness and can take action in response to a change of state.