A probe by new original installation import DS18B20 temperature sensor chip.Stainless steel tube encapsulation waterproof moistureproof prevents rust.Stainless steel shell (6 * 45 mm), lead length 100 mm (shielding wire) use stability;3.0 V-5.5 V power supply;Temperature range wide: -55 ? ~ + 125 ?;Without the external components, the unique single bus.