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: ABS Color: Black Cell Type: 18650 Lithium Battery Nominal Voltage/ Capacity: 7.4V 2400mAH (with protective plate) Nominal Voltage of Solar Panel: 10V Solar Power: 5W Process: Polycrystalline Glass Lamination Air Pump Type: DC miniature air pump Rated Voltage of Air Pump: 6V Noise: ＜60dB Min. Air Flow: 1.4L/min Working Voltage: 5.5-8.4V Max. Working Current: 150mA (high-grade); 100mA(low grade). Static Current: ＜10UA Discharge Protection Voltage: 5.5V Charging Protection Voltage: 8.4V Solar Energy Charging Time: 8H Working Modes: Mode 1: high-grade (green light always on); working hours: one day and one night; flow: 1.3L/min Mode 2: low-grade (blue light always on); working hours: two days and two nights; flow: 0.7l /min Mode 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 nights Size: Approx. 27.5*17.5*1.7 cm/ 10.83*6.89*0.67 inch (Solar Panel) Packing List: 1* Solar Panel 1* Bracket 1* Air Pump 1* Air Pipe 1* Three-way Connector 2* Air Stone 2* Screw 2* Nut 1* Manual Note: 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 clean grime off solar cells to improve charging efficiency. .