1. Self-priming in short time 2. Fueling diesel, Kerosene, not for gasoline 3. Bypass valve built in. This transfer pump with excellent capability of self-priming,1. Self-priming in short time2. Fueling diesel, Kerosene, not for gasoline3. Bypass valve built in.4. Grade of protection: IP55.5. Flow rate: 60L-80L/min6. Voltage: 12v or 24v