- Collar Unit – 2.625″ x 2″ x 1.5″, 9.6 oz. (with beeper belt)
- Add-On and replacement collar unit with Black, Orange, or Green belt for the H2O 1850 PLUS.
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The H2O 1850 Add-On Beeper collar is compatible with the H2O 1850 PLUS system, and it can also replace any lost or damaged H2O 1850 or 1852 collar unit.