FBBULES 12V Digital Thermometer with Probe Water Temperature Meter Gauge Waterproof Electronic for Aquarium Fish Tank Refrigerator,Red

【Wide Temp Range】Temperature Measurement Range: -50℃ ~ +110℃ ; Operating Temperature: -40℃ ~ +65℃ 【Supply Voltage】5V-12V (The maximum limit voltage is 15V, beyond which the thermometer will burn out) 【Size】48mm * 29mm * 22mm/1.89" * 1.14" * 0.87"(approx.); Cable Length: 1M 【Easy to Use】Wiring is simple, the red wire is for positive, and black wire for negative. Pay attention to the positive and negative. If the connection is reversed, the chip will burn out. 【Note】This product does not include 12V power supply, please prepare by yourself. Suitable for measuring fish tank water temperature, refrigerator temperature, etc. (only metal probe is waterproof)