USB Two Uses Solar Oxygen Pump Large Capacity Outdoor Portable Household Fish Pond Oxygenator Features: This product is suitable for oxygenating fish and seafood products when fishing outdoors. It can also be used for courtyard pools, indoor aquarium and hydroponic plants! Connect the bladder stone to the exhaust hole and put it in the water that needs to be oxygenated. The solar cell faces the sunlight. There is no obstruction between the solar cell and the sunlight. Press the Button to start the oxygen pump. Repeatedly press the Button to select different working modes. This product is an electronic product. The oxygenation part of the device cannot be placed in the water, the diversion hole cannot be blocked, and it is more than 0.5M away from the water source. This product is a solar product. The charging speed is relational to the strength of sunlight. Clean the dirt on the solar cell regularly to improve the charging efficiency. Working mode: Working indication: Battery voltage 3.0V-3.6V, red light is on when working; battery voltage 3.6V-4.2V, blue light is on when working; no light is on when shut down. Product Description: Product Name: Portable Solar Aeration System Product Weight: 385g Solar Panel: 5V/1.5W Battery Parameters: 3.7V 2200mAh 18650 Lithium Battery Working Time:>12 hours or more (fully charged) Charging : Solar Charge, USB Adapter Charge. Pump Type:) Pump Maximum Current: 150MA Minimum : 0.3L/min Nozzle Specification: φ4.4MM (External Nozzle of the Product is Ф5.1MM) Packing Information Rated Voltage: 1.8V Noise: 50dB Inner Box Size: 14.2*10*8.2cm Packing list: Oxygen pump*1 Spherical stone*2 2.5m tube*1 roll Straight-through*1 Three-way*1 Charging cable*1 (one USB and one ) English manual*1