Product working mode: 1- Position 1: high speed (indicator constant on in green )   2- Position 2: low speed (indicator constant on in dark blue ) 3- Position 3: work 10 seconds and off 10 seconds circularly (indicator constant on in light blue) Specifications: Material: ABS Solar panel:2.5W, PET laminated Battery:3.7V 1800mAH Product working voltage range:3.0V－4.25V Discharge protection voltage:3.0V Over charge protection voltage:4.25V Max. Current: 450mA Noise: 60dB Waterproof: IP64 Min. Air Flow: 0.6L/min Working Time: Approx. 20 hours Oxygen Hose Length: 2.5m / 8.2ft Wire length: 300cm / 9.84ft Item Size: Approx. 19.1 * 17 * 2.7cm / 7.52 * 6.69 * 1.06in Item Weight: Approx. 533g / 18.82oz Package Weight: Approx. 656g / 23.16oz Package Size: Approx. 21 * 17.5 * 7cm / 8.27 * 6.89 * 2.76in Package List: 1 * Oxygen Pump 1 * Solar Panel 1 * Package of Accessory 2 * Air Stone 1 * Aquarium Oxygen Pipe (2.5m/8.2ft long, can be freely cut as needed) 1 * Manual (English) Note: Pump working mode: works 5 minutes, then stops 30 minutes, and that cycle repeats. There is no need to supply oxygen all day long for fish or plants, thus the pump works intermittently not only good for them but also prolongs the service life of the pump.