FORWARD ROTATION & REVERSE ROTATION: When installing, the "+" and "-" poles of the battery are in the same direction as the "+" and "-" poles of the electric fish scaler body;The cordless fish scaler will rotate clockwise, suitable for right-handed people to use;The "+" and "-" poles of the battery and the "+" and "-" poles on the body are in the opposite direction;The machine will rotate counterclockwise for left-handed people LARGE CAPACITY BATTERY: The electric fish scaler remover is equipped with 2 rechargeable 16.8V 2000mAh lithium battery, charging time: 1-3 hours；After fully charged, the cordless fish scaler can be used for 2.5-3 hours in idle state, it can scrape about 187-198lbs of fish in cold weather, and about 231-243lbs of fish in hot weather HOW TO USE: The electric fish scaler uses a push switch, press the switch and the machine will work continuously, release the switch and it will stop working;Please wear cut-resistant gloves before use. Whether you are left-handed or right-handed, please use your left or right hand to press the switch, then hold the fish head with your other hand and scrape the fish from the head to the tail; The fish scale remover requires a few practice sessions to become proficient in its use; SUITABLE FISH SCALE: The electric fish scraper is suitable for scraping larger and harder fish scales; Suitable for scraping fish weighing 1.1-8.8lbs, such as: mackerel, carp, grass carp, silver carp, black carp, bighead carp, etc. When scaling fish, you need to control the strength of the machine on the fish. For hard fish scales like grass carp and mackerel, the normal strength is fine; while for soft fish scales like silver carp, the strength need to be lighter, so as not to damage the flesh; APPLICATION: Portable automatic cordless electric fish scaler with strong and powerful torque is widely used in fish markets, seafood markets, vegetable markets, hotels, restaurants, fish processing plants and home kitchens. The electric fish scaler is easy to use and quickly scrapes fish scales in minutes, which can save a lot of time and provide more delicious fish for your family and customer;