Description:There is a water level sensor probe at the bottom of the solar aeration pump. It will start working when placed in water. It will not work when out of water. When the battery is exhausted, the product continues to work after being charged at 3.5V in the sun.Features:[Solar Energy] Powered by solar energy, no electricity needed, just the sun, an energy-saving and environmentally friendly product.[Working Mode] The oxygen pump works for 10 seconds and stops for 10 seconds. It is recommended to install it in a small family pond and a small area of the pond to increase oxygen.[Easy to Use] Connect the tube and the air stone, put it in the water, the aerator pump will float in the water and work.[Low Noise] Stable and quiet oxygen pump, it is less than 60 decibels and the air flow is 0.8 liters/minute.[With Battery] Built-in 3.7V 2200mAh lithium battery to store energy, so the oxygen pump can also work at night.Specifications:Material: ABSColor: BlackBattery: 1 x 3.7V 2200mAh lithium batterySolar Panel: 2.5W PET Monocrystalline SiliconLife: 10000 hoursSolar Panel Shape: RoundRated Voltage: 5VNoise: Less than 60dBMax: 0.8LminWorking Mode: Work for 10s and stop for 10sWaterproof: IP65Working Time: 16hCharging Time: 5-6hWorking Temperature: -10~45Occasion: Small PondSolar Panel Diameter: 18cm/7.08inchPackage Size: 19*19*6cm/7.48*7.48*2.36inchPackage Weight: 400g/0.88lbPackage List:1 * Solar Aerator Pump1 * Bubble Stone1 * Air UNote:1. The working power of the solar panel will be influenced by weather, location, etc.2. Do not run the pump without water, otherwise its lifespan will be shortened.3. the pump regularly. If it is duty, it will stop working.4. The package contains small parts, so please keep them away from children and pets (choking hazard).becomeveryrich,"