Introduction: The DC pumps are carefully inspected and tested to ensure both safety and operating performance. However, failure to follow the instructions and warnings in this manual may result in pump’s damage and/or serious injury. Be sure to read and save this manual for future reference. Attention: Sensor is a replacement Kits, Not Include Warranty. Suggestion for 8 to 12 months to Change. Please Keep the sensor Clean and keep water level consistency. 1. High performance with innovational motor, and energy saving up to 50%, super quiet. 2. Suitable for both marine and fresh water, Rust free. 3. With anti-resistant ceramic shaft, last longer. 4. Auto Overflow Protection. 5. 10 / 30 / 50mins for feeding or change of water in aquarium use. 6. Water Lever Sensor – Overflow/water shortage. 7. Wave mode, 0~10Voutput (only DCA4000/6000/9000/12000)