Ask for latest offers/availability : https://bit.ly/2xYj0db 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 cm (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.