Temperature Measurement Range -50~+110, Working Temperature: -10~+50, Temperature Measurement Accuracy: 1.0. Product Details Product Size: 48*28*15mm. Battery: 2 LR44 1.5V button cells. Cable Length: 1m. Probe DesignThe product uses a metal sensor to test the temperature. The probe part is waterproof, but the thermometer body is not waterproof. Easy to ReadWith LCD display, visual effects, YOU can see the temperature in the distance. This thermometer has a probe that allows you to test specific places in depth to easily get the results you want. Greenhouses, musical instrument rooms, wine cellars, basements, warehouses, etc. Product Description Color Name: 4 PCS with External Sensor Product Feature: 1. LCD Digital Thermometer Temperature Probe Sensor Tester for Fridge Freezers Aquarium 2. This is a portable temperature sensor, it can also be used for test object temperature through the metal sensor. 3. Modeling simple, elegant, LCD display, moisture-proof, strong anti-interference, gold-plated for refrigerated cabinets, counters and other temperature measurement needs. Product specification: Temperature measurement range: -50~110 Operating temperature: -10~+50 Temperature measurement accuracy: 1.0 Cable length: 1m Power supply: 2x 1.5V LR44 button cell batteries (Does not contain battery) Note: 1. This thermometer cannot be used in lower temperature environment for a long time, because long periods of low temperature will die and damage batteries. 2. Only the probes are waterproof. The main body of the thermometer is not waterproof. Package Included: 4x Digital Fridge Freezer Thermometer