Specifications:Senses Ferrous and Non-ferrous Metal Objects to "Zero Speed"Operates from Zero to 10 KHz Pulse Output RateEpoxy Encapsulated For Oil, Dirt, & Moisture ResistanceStainless Steel CaseSenses Targets as small as 24 DP Gear Teeth10 foot 3-wire shielded cable8 to 30 VDC Powered