The Vink tail docker is a rechargeable battery operated unit capable of reaching a very high temperature in only 10 seconds and stays hot (approximately 1200ºF) for about 12 minutes. Dock 80+ piglets on a fully charged battery. Keep extra on hand to finish all litters. Sharp blade ensures safe and effective cauterizing cuts, eliminating excessive bleeding and infection. Comes with two rechargeable batteries and a 110V charger. Spare blades, batteries and charger units available.