Description: Adjustable temperature of 20??? to 34???. Easy installation, simple operation, high temperature performance, explosion-proof quartz glass tube. Sensitive temperature regulator and over-temperature protection device, with high-resistance heating wire, fever uniform and stable, long service life. Good heat resistance, good insulation, high heat transfer efficiency, with strong support hooks and parking sucker, making its work more stable and reliable. Double waterproof protection, full submersible design, can accurately maintain the set temperature. The maximum immersion depth 120cm/47.24" work environment, this product is only applicable to use in fresh water and sea water.