1 Adjustable temperature from 20 to 34 . 2 Easy to install and use, high temperature resistance, explosion-proof quartz glass tube, high safety! 3 The bar is equipped with sensitive temperature regulator and overtemperature protection device, and adopts high resistance heating wire, which provides uniform and stable heating and long usage. 4 The bar is equipped with sensitive temperature regulator and overtemperature protection device, and adopts high resistance heating wire, which provides uniform and stable heating and long usage. 5 Double layer waterproof protection, full diving design, can accurately maintain the set temperature. 66. It can be immersed in water depth of 120CM at most. This product is only suitable for fresh water and seawater.1 x Heater