DT Systems H2O Add-On Collar FREE SHIPPING (Lower 48 US States) Our Price:  $ 134.95 Write a Review | Read Reviews Color :  Black Green Orange Quantity :  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Part#: H2OADD1 Availability: In stock Leaves Warehouse: 2 business days Make your H2O 1810PLUS, 1820PLUS, or 1830PLUS a multi-dog system Black is the default collar color and is recommended if you need to replace the original collar/receiver that came with your DT Systems H2O system. Orange and/or Green are available to expand your H2O PLUS unit to a 2-dog or 3-dog system.

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DT Systems Micro-iDT ADD-ON Collar