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 removes fish scales in minutes, saving time and helping prepare fresh fish for family meals or customers. Forward Rotation & Reverse Rotation: When installing the battery, align the "+" and "-" poles of the battery with the "+" and "-" poles on the scaler body for clockwise rotation, suitable for right-handed users. Reverse the battery polarity to achieve counterclockwise rotation, ideal for left-handed users. Extra Rechargeable Battery: The electric fish scaler comes with a rechargeable 16.8V 2000mAh lithium-ion battery. Charging time is 1–3 hours. After full charge, the device operates continuously for 2.5–3 hours in idle mode. It can scale approximately 220 lbs of fish under normal conditions, around 187–198 lbs in cold weather, and about 231–243 lbs in hot weather. How to Use: The electric fish scaler features a push-button switch. Press and hold the switch to operate; release to stop. Wear cut-resistant gloves before use. Whether left- or right-handed, use one hand to press the switch and the other to securely hold the fish by the head. Scrape from the head toward the tail. Some practice may be needed to master proper technique. Suitable Fish Scales: This electric fish scaler is designed for larger fish with tougher scales. It works well on fish weighing between 1.1 and 8.8 lbs, such as mackerel, carp, grass carp, silver carp, black carp, and bighead carp. Adjust pressure based on scale hardness—use normal pressure for tough scales like those on mackerel or grass carp, and lighter pressure for softer scales like those on silver carp to avoid damaging the flesh.