(Kerbyl) Dehorning is now as simple and routine as putting in an ear tag! Instant, concentrated 1400-degree heat at cutting tip is 2-3 times hotter than conventional electric iron. Bloodless cauterizing procedure; dehorn year-round. Cordless; will dehorn up to 15 calves on a full charge. Audible timer alerts user of 6-8 second timing. Includes 110v charger and a 12v cigarette lighter charger. For best results, use on calves under two weeks of age. Diameter is 3/4". One year limited warranty.