product manual Power Weight Length Line Length    25W 168g 20.5cm 80cm  50W 168g 20.5cm 80cm  100W 211g 26.5cm 80cm  200W 235g 30.5cm 80cm  300W 235g 30.5cm 80cm   1, can adjust the temperature of 20 degrees to 34 degrees.2, easy to install, simple operation, using high temperature performance, explosion-proof quartz glass tube, high security!3,The stick is equipped with sensitive temperature regulator and over-temperature protection device. It adopts high-resistance heating wire, which has uniform and stable heating and long service life.4, good heat resistance, good insulation, high thermal conductivity, with a strong support hook and mooring suction cup, making it more stable and reliable.5, double waterproof protection, full-submersible design, can accurately maintain the set temperature.6, the maximum can be immersed in water depth 120CM environment, this product is only suitable for use in fresh water, sea water.  【Specifications】  Voltage: 220V-240V Frequency: 50HZ-60HZ Power: 100W/200W/300W/500W Temperature control range: 20-34