Wireless Limit Switch, Heavy Duty, Height (In.) 4.574, Depth (In.) 1.745, Width (In.) 1.620, Replacement Head LSZ1C, Contact Type 1NC, 1NO SPDT Snap Action, Movement Pretravel (PT) 1, 78 mm [0.07 In.] Max, Overtravel (OT) 4, 83 mm [0.190 In.] Min, Differential Travel (DT) 0, 38 mm [0.015 In.] Max, Style Top Pin Plunger, Voltage 3.6 VDC Lithium Thionyl Chloride, 2/3AA size, NEMA Rating IP67, NEMA 1, 3, 4, 6, 6P, 12, 13, Operating Temp. Range (F) -40 to 160, Operating Force 4 in per lb Max. Wireless Limit SwitchesSwitch will require an antenna to function properly. Battery life: up to 3 yr.RoHS and FCC Compliant.Enclosures are NEMA 1, 3, 4, 6, 6P, 12, 13, and IP67; except 19N853 is NEMA 1, 4, 12, 13, and IP67 only Operating temp.: -40 to 160 F; 19N853 is -35 to 160 F