Feature: 1. SOLAR POWERED: Solar powered oxygen pump, no extra battery and plug is needed. Environmentally friendly and safe. 2. ADJUSTABLE ANGLE: Solar panel angle can be adjusted to get more sufficient solar energy. 3. EASY INSTALLATION: Solar Panel can be stuck into the ground or mount it on the wall. 4. 3 WORKING MODES: Strong, medium and weak. Fully meet various situations and needs. 5. MULTI PURPOSE: Solar powered air pump is widely used for adding air into various fish tank, pools, ponds, aquariums. Specification: Item Type: Solar Powered Oxygen Air Pump Product Material: ABS, Polysilicon Battery Type: Lithium Battery (Shipped with Built in Battery) Battery Model: 18650 Battery Capacity: 2200mAh Solar Voltage: 6V Output Power: 4W Gross Weight: 982g/2.2lb. Package List: 1 x Solar Panel1 x Hose3 x Accessories4 x Screws4 x Expansion Tube2 x Bubble Stone1 x Instruction Manual1 x Bracket (5 Small Pieces) Note: Package comes with 1 long air tube rather than 2 or 3 short ones. Please cut it into 3 pieces as needed, then connect them with Y Connector.