SOLAR PUMP OXYGEN PUMP AERATOR 2,5W Solar powered pump, no charge and plug, economical and environmentally beneficial. Includes 2 soft hoses, 2 aeration and enhancement stones. Built-in lithium battery 3,7 V 1800 mAh 18650 do energy storage, so that the pump also works at night. Double the airflow with the connected Y cable. 50dB silent oxygen pump. Suitable do outdoor aquarium, fish pond or fishing. Product Operation Mode: Position 1: high speed (constant indicator glows green)li> Position 2:low speed (constant indicator in combination with dark blue)li> Position 3:Work for 10 seconds and turn off for 10 seconds over and over (fixed LED lights up bright blue)li> Technical data: Material: ABS Solar Panel: 2,5W, PET Laminated Battery: 3,7 V 1800 mAH Product Week Range: 3,0 V (4,25 V) Discharge supply voltage: 3,0 V; Voltage before charging voltage: 4,25 V; Memory clock speed Current: 450mA Noise: 60dB Waterproof: IP64 min. Airflow: 0,6 l/min Working time: OK. 20 hours Length of oxygen assembly: 100 cm / 39,37 inch Wire Length: 3 M/118 INCH Product Size: approx. 19,1 * 17 * 2,7 cm / 7,52 * 6,69 * 1,06 inch Product Weight: Approx. 533g / 18,82 oz 21 * 17,5 * 7 cm / 8,27 * 6,89 * 2,76 inch Pump operating mode: works for 5 minutes, then stops for 30 minutes and cycles repeat. It does not ma to supply fish or plants made available throughout the day, so that the pump works intermittently only for them, but also extending the pump.