Features:1. Made of good quality ABS material, solid, durable and wear-resistant.2. Powered by sunlight, energy-saving and eco-friendly.3. Solar panel attaches to air pump supply power.4. Three mode options: high grade, low grade, low grade on for 10 seconds, stop for 10 seconds.5. It is super silent without noise, which will not disturb the surrounding people and fish.Specifications:Shell Main Material: ABSColor: BlackCell Type: 18650 Lithium BatteryNominal Voltage/ Capacity: 7.4V 2400mAH (with protective plate)Nominal Voltage of Solar Panel: 10VSolar Power: 5WProcess: Polycrystalline Glass LaminationAir Pump Type: DC miniature air pumpRated Voltage of Air Pump: 6VNoise: 60dBMin. Air Flow: 1.4L/minWorking Voltage: 5.5-8.4VMax. Working Current: 150mA (high-grade); 100mA(low grade).Static Current: 10UADischarge Protection Voltage: 5.5VCharging Protection Voltage: 8.4VSolar Energy Charging Time: 8HWorking Modes: Mode 1: high-grade (green light always on); working hours: one day and one night; flow: 1.3L/minMode 2: low-grade (blue light always on); working hours: two days and two nights; flow: 0.7l /minMode 3: low grade; on for 10 seconds and stop for 10 seconds (green and blue lights are always on); working hours: three days and three nightsSize: Approx. 27.5*17.5*1.7 cm/ 10.83*6.89*0.67 inch (Solar Panel)Packing List: 1* Solar Panel1* Bracket1* Air Pump1* Air Pipe1* Three-way Connector2* Air Stone2* Screw2* Nut1* ManualNote:1. This product is an electronic product. The oxygenating device cannot be placed in water and the diversion hole cannot be blocked.2. This product is a solar product. The charging speed is related to the strength of sunlight. Regularly cleangrime off solar cells to improve charging efficiency..