Garmin Battery Packs for T 20 & TT 25 Dog Devices Option:Extended This expansion kit includes a

This expansion kit includes a 500' spool of wire

The SportDog NoBark SBC-8 Collar is SportDog's easiest to use bark collar with its simple but effective design

serrated blades

This collar features bright

ghost stories

Garmin Battery Packs for T 20 & TT 25 Dog Devices Option:Extended This expansion kit includes aGarmin Battery Packs for T 20 & TT 25 Dog Devices are available in standard and extended. The standard battery pack is the same as the battery that came on your T 20 or TT 25. It allows up to 68 hours using dynamic update rate. The extended battery pack is an upgrade on the battery that came on your T 20 or TT 25. It allows up to 136 hours using dynamic update rate.