Features: 1¡¢ABS outer cabin isolates mechanical noise, large LCD screen, easy to use, multiple noise reduction, providing comfortable sleep and rest experience. 2¡¢Precise components, stepless air volume adjustment, airtight engine room to isolate the movement noise, rubber foot pads to isolate resonance noise. 3¡¢Pure copper motor, energy?saving and long?lasting power, rechargeable lithium battery, safe and long?lasting battery life. 4¡¢One machine with two functions, not only can be used indoors, but also can be used for outdoor fishing. 5¡¢Large capacity of 4000mAh, long battery life of 68 hours, fast charging, and oxygen at all times. 6¡¢Good power failure protection, intelligent AC and DC use, self?starting after power failure. Package included: 1 x Oxygen Pump 1 x Data Line 1 x Plug