Just put the solar panel in a sunny spot and the solar oxygen pump starts automatically. There are three working modes to choose from, high gear, low gear, and intermittent mode. Suitable for a small to medium-sized pond, outdoor fish tank or water reservoir, etc. Features: [Solar Energy]The use of solar energy makes it environment-friendly, portable, and easy to install with no need for wiring, no operating cost, and maintenance-free, and solar power is much safer for your kid. [Evenly Air Distribution]There are 3 working modes that can meet your different demands, and two air stones make the air distribution more even and pervasive. [With Battery]Built in a 3.7V 4400mAh lithium battery pack for storing energy, thus the oxygen pump working in the night as well. [Adjustable Angle]The solar panel angle can be adjusted to receive the sunlight most sufficiently. Perfect for bird bath, small pond, garden decoration, water circulation for oxygen, etc. [Safe to Use]Support overcharge and over-discharge protection, high safety factor. 22H/55H/110H of continuous use when fully charged. Specifications: Material: ABS, Aluminum Alloy Color: Black Solar panel:10W/10V Polysilicon Battery:7.4V 4400mAh Lithium Battery Solar charge time: 8 hours Mode: high gear, Low gear, Intermittent(Open for 10s, stop for 10s) Working hours: 22H/55H/110H Control mode: Switch Control Maximum bubble volume: 1L/min Minimum bubble volume: 0.5L/min Maximum water depth: 1m Noise: 60dB Waterproof: IP65 Occasion: Fish Tank, Small Pond, Bird Bath Package Size: 38*30.5*10cm / 14.96*12*3.93inch Package Weight: 2250g / 4.96lb Package List: 1 * Solar Panel 1 * Oxygen Pump 1 * Package of Accessory 2 * Air Stone 1 * Aquarium Oxygen Pipe 1 * Manual Note: This product is an electronic product. The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked.