Easy to carry, outdoor fishing friends ==== Small fish tank pump, only weighs 14.11 oz, easy to carry. Support solar energy and USB charging, even if the sun is weak, the water pump can continue to work, saving money and electricity. In case of bad weather, it can be charged anytime, anywhere with a laptop and a power bank via a USB cable. You don't have to worry about carrying a lot of power banks when you go out fishing. Enjoy fishing with your kids and family on weekends. 1. Cell standard: Cell type: 18650 lithium battery Nominal voltage/capacity: 3.7V 3600mAH (two 1800mAH parallel) 2. Solar panel parameters: Nominal Voltage: 5V Power: 0.9W Process: Polycrystalline PET Lamination 3. Parameters of oxygen booster pump: Air pump type: DC micro air pump Rated voltage: 3.0V Bath sound: less than 60dB Maximum airflow: 0.9L/min Minimum airflow: 0.5L/min 4. Circuit parameters: Operating voltage range: 3.0V-4.25V Maximum working current: 150+-10MA (high-grade) 75+-10MA (low-grade). Static current: less than 500UA Discharge protection voltage: 3.0V Charging protection voltage: 4.25V Whether with light control: without light control 5. Working mode: 1: Upscale 2: low gear 3: Low gear open for 10 seconds and stop for 10 seconds. 4: Shutdown Working instructions: battery voltage 3.0V-3.6V, red light when working; battery voltage 3.6V-4.2V, blue light when working; no light when shutdown. 6. Charging method: Method 1: USB charging (5V 1A charging) Method 2: Solar panel charging (the product is placed in the outdoor sunlight) Charging indication: battery voltage is 3.0V-3.9V, the red light breathing indicates charging when charging; Battery voltage 3.9V-4.2V, blue light breathing indicates charging when charging, The blue light is always on when fully charged. Six. Note the top: 1. This product is an electronic product. The oxygen-enhancing part of the device cannot be placed in water, the diversion hole cannot be blocked, and the distance from the water source is more than 0.5M. 2. This product is a solar product. The charging speed is related to the intensity of sunlight. Regularly clean the dirt on the solar cell to improve the charging efficiency.