Replacement battery fits 30 Dog Guard compatible models. Specifications: 160mAh, 6V, Silver Oxide. Compatible with: Perimeter R-21, Perimeter Ultra Fence, Perimeter PTPFS-003, Perimeter PTPCC-100, Perimeter PTPCC-100D, Perimeter PTPCC-100DP and 24 more compatible models. Replaces: Perimeter PTPRB-003, Dog Guard ST1214. Dog Guard replacement battery designed for Dog Collar devices.