DOGTEK EF-4025 Extra Collar for Electronic Dog Fence This Additional Receiver Collar is compatible with any Electronic Dog Fence Systems of the DOGTEK brand. An unlimited number of dogs can be added to DOGTEK Electronic Dog Fence Systems as long as they wearing a compatible Receiver Collar. Features Two Zones (warning and correction) 8 Levels of stimulation Fully Waterproof Collar 6 Months Autonomy Lifetime Limited Warranty Specifications Dimensions (W H L): 1.6 x 1.3 x 2.3 inches Weight: 3 oz Collar length adjustable: 8 - 26 inches Power: 3V Lithium CR2 battery

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