Description: Submerge the probe into fish tank to measure water temperature. As indoor reptiles living temperature thermometer, or outdoor thermoemeter. Suit for any fresh water; also can be used for DIY Brew Beer and wine. Made of plastic that is safe for your aquarium. Battery not included for shipment. Specification: Size Style 1 (LxWXH): approx. 6x1.2x7.2cm/2.36x0.47x2.83inch Measurement Range: 0-99 Degree Power: 2x1.5V Style 2 (LxWXH): approx. 5.8x1.5x9cm/0.23x0.01x0.35inch Measurement Range: 0-50 Degree Power: 1.5V Wire Length: 104cm Style 3 (LxWXH): approx. 8x1.8x7cm/0.31x0.07x0.23inch Measurement Range: 0-55 Degree Power: 1.5V Wire Length: 103cm Package Includes: 1 Piece Digital Aquarium Thermometer Note: Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item. Please allow slight dimension difference due to different manual measurement.